Doing Amortization with AMRT
QED Education Scientific
5
AMRT
9
EXE
SOLVE
SOLVE
ESC
EXE
CMPD
0
3
EXE
3
6
EXE
3
5
(
─
)
0
EXE
0
1
EXE
2
EXE
1
2
0
In this last example we could have entered values other than 1 to PM1 and still get
the same result, as long as the values entered are integer
≥
1. However, in most
circumstances we should always let PM1 < PM2 whenever possible (see page E-57
of User Guide.)
Example 2
►
>>
Referring to Example 1, find the interest portion and the principal
portion of the 9
th
payment.
Operation
If you are doing this immediately after Example 1, then all relevant values are still
intact and you can continue; otherwise you should enter those values again.
Enter AMRT mode, scroll down to enter 9 for [PM1], make sure [PM2] is not = 0.
Scroll down further to select [INT:Solve] and solve it.
Therefore the interest portion of this 9
th
payment is about $19.90.
Return to AMRT, and then scroll to select [PRN:Solve] and solve it.
The calculator indicates that the principal portion of 9
th
payment is about $203.97.
█
Example 3
►
>>
Lucas borrows $35,000 at
%
3
12
=
j
to buy a car. The loan should
be repaid with monthly installment over three years. Find the total interest paid in
the 12 payments of the second year.
Operation
Again we begin at CMPD mode to find the monthly payment of the loan.
Enter CMPD mode and make sure calculator displays [Set:End]. Then scroll
down and enter 36 for [n], 3 for [
I%
], (-)35000 for [PV], 0 for [FV], 12 for [P/Y] and
[C/Y].
•
•
•
Output: INT = 19.89316037
Output: PRN = 203.9697351
Screenshot from Casio TVM