User manual

ECTACO
®
jetBook
®
COLOR User Manual
57
Accounting Calculator
This useful feature of your ECTACO
®
jetBook
®
COLOR 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 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.
 Using the stylus, place the cursor in the Years field.
 Type 20.
 Place the cursor in the Rate field.
 Type 7.5.
 Use the stylus to select one of the following options: Show by
year or Show by month.
 Select the desired Starting month.
 Select the Loan key and then select the Report key. You will
see the report. Use the Round key to specify the number of
decimal places: 0, 2, 4 or N (unlimited).
How to Add or Subtract a Tax
Let's consider an article of $1500. Suppose the sale tax is 10%.
 Select the TAX key to switch to the Rate field.