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TI BA-35 Solar, Quick Reference Manual

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30

BA35ENG.DOC   BA-35 Solar Quick Reference Guide
Pat Hatcher   Revised: 05/08/00 1:13 PM   Printed:
05/08/00 1:13 PM   Page 30 of 38

Common Keystroke Sequences

Monthly Payment for a Home Mortgage

Purpose: To find the amount of the monthly
payment on a mortgage with end-of-month
payments (ordinary annuity).

Values You Supply:

§ 

mortgage amount

§ 

annual interest rate

§ 

number of years in mortgage

Procedure

Key
Sequence

Clear calculator and mode
registers; select two decimal
places.

-

 

-

0

 

b

0

 

c

 2

Press 

2

 until FIN is

displayed.

2

Press 

0

 

a

 until Begin is

not displayed.*

0

 

a

Enter mortgage amount.

mortgage 

K

Calculate interest rate.

rate 

0

 

h

Enter interest rate.

I

Calculate number of payment
periods.

years 

0

 

i

Enter number of payment
periods.

C

Compute monthly payment.

1

 

M

*

If payments occur at the beginning of each
month (annuity due), press 

0

 

a

 until

Begin is displayed.

Summary of Contents for BA-35 Solar

Page 1: ...0 Percentage Calculations 12 Percentage Change Calculations 13 Margin and Markup Calculations 14 Compound Interest Calculations 16 Annuity Calculations 18 Converting to EFF or APR 23 Balance Interest and Principal 24 Statistics 27 Common Keystroke Sequences 30 Error Conditions 35 In Case of Difficulty 37 TI Product Service and Warranty Information 38 1996 by Texas Instruments Incorporated ...

Page 2: ...articular mode prepares it to perform special functions The available modes are statistics financial and profit margin Indicators in the display tell you the calculator s current mode STAT displays for statistics FIN for financial No indicator is displayed for profit margin mode 2 Changes the calculator to the next mode in sequence To set the calculator to a particular mode press 2 repeatedly unti...

Page 3: ...0 press it again to cancel its effect Clearing the Calculator u All Clear On Clears the calculator completely including the display all pending operations and the memory and mode registers Pressing u also sets the calculator to floating decimal format and financial mode Clear Entry Clear Clears incorrect entries error conditions the display or pending operations It does not affect the memory the m...

Page 4: ...ss the second function of the next key pressed appears when you press 0 FIN The calculator is in the financial mode STAT The calculator is in the statistics mode Note No indicator displays when the calculator is in profit margin mode Begin The calculator computes annuities as beginning of period payments rather than end of period payments Displayed only in the financial mode continued ...

Page 5: ...n The value in the display is the summed principal over a range of payments Displayed only in the financial mode prn The value in the display is the principal for a single payment Displayed only in the financial mode Gint The value in the display is the summed interest over a range of payments Displayed only in the financial mode int The value in the display is the interest for a single payment Di...

Page 6: ...ters a decimal point Change Sign Changes the sign of the number in the display To enter a negative number first enter the number as a positive value and then press Arithmetic Keys p o n m Perform the arithmetic operations of addition subtraction multiplication and division l Equals Completes all pending operations and displays the result of a calculation ...

Page 7: ...t order press w to reverse them Then complete the calculation v Backspace Removes the last digit or decimal point from the displayed number if you have not yet pressed an operation key p o n m etc This key is useful for correcting entry errors without having to clear the display and start again Correcting Immediate Functions You can often correct an immediate function by performing the reverse ope...

Page 8: ...r exponent For example 5 9 12 means 5 9 x 1012 The calculator is always in floating decimal format when you turn it on By changing the display format you can convert a number from one format to another 0 c Fixed Decimal Enables you to set the number of decimal places displayed in a result To set the number of decimal places press 0 c and then press the appropriate digit key 6 To remove the fixed d...

Page 9: ... pressing r thereby storing a zero in memory t Sum Adds the displayed numeric value to the contents of the memory To add a series of numbers to the memory use r to store the first number thereby replacing any previous value Then use t with the remaining numbers Use s 0 P to display the total To subtract the displayed value from the value in memory press to change the sign of the displayed value an...

Page 10: ...r 0 k Square Root Calculates the square root of the displayed number The displayed number must be positive or zero otherwise an error condition occurs The result is always positive 0 H Universal Power Raises any positive number to any power within the range of the calculator or calculates any root of any positive number within the range of the calculator To calculate a power 1 Enter the number y t...

Page 11: ... the operation 0 G Natural Logarithm Calculates the natural logarithm base e 2 718281828459 of the displayed number The number must be positive otherwise an error condition occurs 0 Natural Antilogarithm Calculates the natural antilogarithm of the displayed number This is equivalent to the value of e raised to the power of the number in the display ...

Page 12: ...quence Function Percentage n n E l Calculates n of the principal amount Add On p n E l Calculates n of the principal amount and adds the result to the principal Discount o n E l Calculates n of the principal amount and subtracts the result from the principal Percentage Ratio m n E l Divides the principal amount by n ...

Page 13: ...es To calculate the percentage change 1 Enter the new value 2 Press 0 4 3 Enter the old value 4 Press l The percentage change is calculated by the formula New value Old value Old value x 100 If the result is positive there is a percentage increase If the result is negative there is a percentage decrease ...

Page 14: ... selling price 0 Z Markup Enters the markup which is the difference between selling price and cost expressed as a percentage of the cost If the percentage is positive the selling price is greater than the cost If the percentage is negative the selling price is less than the cost 1 Computation Key Computes the unknown value for gross profit margin problems and markup problems Recalling Values To re...

Page 15: ...o display indicator 2 Enter the two known values CST SEL or MAR 3 Press 1 and the key for the unknown value Performing Markup Calculations To calculate cost selling price or markup 1 Press 0 b to clear the registers and use 2 to enter the profit margin mode no display indicator 2 Enter the two known values CST SEL or MU 3 Press 1 and the key or key sequence for the unknown value ...

Page 16: ... of regular equal payments Compound Interest Keys In compound interest calculations the following keys are used to enter or calculate the values listed below C Total number of compounding periods I Percent interest per compounding period K Present value of a future amount With a savings account for example PV represents what your money is worth today L Future value of a present amount With a savin...

Page 17: ... you must know any three of the four values N i PV or FV Follow these steps to find the unknown value 1 Press 0 b to clear the registers and use 2 to enter the financial mode FIN appears in the display 2 Enter the three known values N i PV or FV 3 Press 1 and the key for the unknown value For compound interest calculations the payment PMT must be zero This value is set automatically when you press...

Page 18: ...ms beginning of period payments Pressing 0 a causes Begin to appear in the display The beginning of period function is in effect until you cancel it by pressing 0 a again or leave the financial mode When Begin is in the display the calculator solves using beginning of period payments When Begin is not in the display the calculator solves using end of period payments Note If an annuity problem does...

Page 19: ...itive or negative depending on the type of problem you are solving as explained on page 20 L Future value of a series of payments plus the future value of PV With a savings account FV represents the final amount withdrawn With a loan FV represents any balloon payment that must be made in addition to the last regular payment 1 Computation Key Computes the unknown value for annuity problems When Beg...

Page 20: ...ent amount may be positive or negative depending on the type of problem you are solving If payments are discounted backward the payment amount is positive This is the case in mortgage loan bond and lease problems These problems have a present value but they may or may not have a future value If there is no future value FV 0 If payments are compounded forward the payment amount is negative This is ...

Page 21: ...ectly for the type of annuity calculation desired For ordinary annuities Begin should not be displayed For annuities due Begin should be displayed Press 0 a to turn Begin on or off 3 Enter the four known values N i PV PMT or FV 4 Press 1 and the key for the unknown value Note Generally solving for the interest rate requires more time than other calculations If you use unrealistic values the calcul...

Page 22: ...the result The two steps above have the same effect as entering the number of years and then pressing m 12 l 0 i Number of Monthly Payments Multiplies the number in the display by 12 and displays the result This number can then be stored as the number of compounding periods or payment periods N To use the 0 i key sequence 1 Enter the number of years for a compound interest or annuity problem with ...

Page 23: ...t achieves the same future value as the APR The EFF is the rate at which you actually earn for the period of time stated 0 N APR to EFF Converts annual percentage rates to annual effective rates 1 Enter the APR 2 Press 0 N 3 Enter the number of compounding periods per year c yr for the APR 4 Press l to calculate the EFF 0 O EFF to APR Converts annual effective rates to annual percentage rates 1 En...

Page 24: ...eriod payments 2 Enter the appropriate values with the C I K L and M keys 3 Enter the payment number 4 Press W V Interest and Principal Calculates the interest and principal portions of a single payment when used with the X key it calculates the accumulated interest and principal over a range of payments X Payment Range Entry Key Enters a selected range of payments payment 1 through payment x so t...

Page 25: ... of period payments 2 Enter the appropriate values with the C I K L and M keys 3 Enter the payment number 4 Press V to calculate the interest The int indicator is displayed with the result 5 Press w to display the principal The prn indicator is displayed with the result If you want to display the interest portion again press w Pressing w alternately displays the interest and principal ...

Page 26: ... period payments 2 Enter the appropriate values with the C I K L and M keys 3 Enter the first payment number P1 and press X 4 Enter the second payment number 5 Press V to calculate the interest The Gint indicator is displayed with the result 6 Press w to display the principal The Gprn indicator is displayed with the result If you want to display the interest portion again press w Pressing w altern...

Page 27: ... values currently stored in the statistical registers 0 f Statistics Data Removal Removes a data value from the statistical registers Each time you press 0 f the display shows the number of data values currently stored in the statistical registers Entering Two Variable Data Values Use w in conjunction with g to enter data points with both x and y values as follows 1 Enter an x value and press w 2 ...

Page 28: ... x values Standard Deviation The 0 y and 0 x key sequences calculate the standard deviation of the data values in the statistical registers If you entered data points with x and y values press 0 y or 0 x to display the standard deviation of the y values then press w to display the standard deviation of the x values 0 y Population Deviation Calculates the n weighted or population standard deviation...

Page 29: ...you display the y intercept 0 d Correlation Calculates the correlation between the x and y values in a set of data points 0 T 0 Q Predicted Value After you enter an x value you can press 0 Q to display the y value that corresponds with that x on the best straight line through the data points entered Similarly after you enter a y value you can press 0 T to display the corresponding x value ...

Page 30: ...ocedure Key Sequence Clear calculator and mode registers select two decimal places 0 b 0 c 2 Press 2 until FIN is displayed 2 Press 0 a until Begin is not displayed 0 a Enter mortgage amount mortgage K Calculate interest rate rate 0 h Enter interest rate I Calculate number of payment periods years 0 i Enter number of payment periods C Compute monthly payment 1 M If payments occur at the beginning ...

Page 31: ...equence Clear calculator and mode registers select two decimal places 0 b 0 c 2 Press 2 until FIN is displayed 2 Press 0 a until Begin is not displayed 0 a Enter mortgage amount mortgage K Calculate interest rate rate 0 h Enter interest rate I Calculate number of payment periods years 0 i Enter number of payment periods C Enter payment amount payment M Enter payment number and calculate balance nu...

Page 32: ...and insurance The total monthly payment principal interest taxes and insurance is not to exceed a predetermined percentage limit of the buyer s gross monthly income Values You Supply annual interest rate number of years in mortgage buyer s gross monthly income percent limit of gross monthly income percent taxes and Insurance of total monthly payment percent down of selling price Procedure Key Sequ...

Page 33: ...rs 0 i C Calculate and store maximum monthly payment income n percent limit E l r Calculate and enter maximum allowable loan payment without taxes or insurance 1 p percent taxes and insurance E l 0 n s 0 P l M Compute maximum allowable loan amount 1 PV Calculate house price including down payment 1 o percent down E l 0 n s K l Calculate down payment o s K l ...

Page 34: ...sion Values You Supply original price dollar amount profit dollar amount points percentage points commission percentage points Procedure Key Sequence Clear calculator and mode registers select two decimal places 0 b 0 c 2 Press 2 until no mode indicator is displayed 2 Add original price and profit to calculate cost before points are added on and enter original price p profit l R Enter points as a ...

Page 35: ...mode Errors occur when you Calculate a result that is outside the range 9 999999 x 1099 to 1 x 10 99 zero or 1 x 10 99 to 9 999999 x 1099 Divide a number by zero Calculate 0 G or 0 of zero Calculate 0 4 for an old value equal to zero Calculate 0 k 0 G or 0 H of a negative number Use 0 H to raise zero to the power of zero Press a key or key sequence that cannot be performed in the current mode Fina...

Page 36: ...occur when you Use g to enter a data point x or y such that x 1 x 1050 Press 0 f when there are less than two data points in the statistical registers Calculate 0 x with only one data point Perform a statistical calculation when there are no data points Perform a linear regression calculation with less than two data points Perform a linear regression calculation on a vertical line Enter a series o...

Page 37: ...ht source A function does not seem to work Be sure the calculator is set for the correct mode profit margin FIN or STAT The number of decimal digits that you expect is not displayed Be sure the display is set to the correct format floating decimal or fixed decimal An error occurs Check the error conditions listed on pages 35 36 If you experience difficulties other than those listed above press u t...

Page 38: ...visit the TI calculator home page on the world wide web e mail address ti cares ti com internet address http www ti com calc Service and Warranty Information For information about the length and terms of the warranty or about product service refer to the warranty statement enclosed with this product or contact your local Texas Instruments retailer distributor ...

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