
ECTACO
®
jetBook
®
K-12
User Manual
56
• In the
Main Menu
, select
Science and Math
. You will
see the
Science and Math
window.
• Select
Scientific Calculator
.
• Use the trackball to select the desired on-screen keys.
Accounting and Loan Calculator
This useful feature of your ECTACO
®
jetBook
®
K-12
enables you to compute monthly payments and amounts
of principal and interest paid or payable to date on your
loans and mortgages. You can also make tax
calculations.
• In the
Main Menu
, select
Science and Math
. You will
see the
Science and Math
window.
• Select
Accounting and Loan Calculator
.
How to Calculate a Loan
For example, let's consider a mortgage: initial price is
140000, payment period is 20 years, annual interest rate
is 7.5%.
• Select the
Loan
key.
• Type
140000
.
• Press the
Speaker
key to switch to the
Years
field.
• Type
20
.
• Press the
Speaker
key to switch to the
Rate
field.
• Type
7.5
.
• Use the
Speaker
and
Record
keys to select the
Show
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