32 Section 2: Memory Stack, LAST X, and Data Storage
4v5.2-
8.33*´K7.46
-.32*÷
3.15v2.75-
4.3*1.71v
2.01*-÷
2. Use constant arithmetic to calculate the remaining balance of a $1000
loan after six payments of $100 each and an interest rate of 1% (0.01)
per payment period.
Procedure: Load the stack with (1 + i), where i = interest rate, and key
in the initial loan balance. Use the following formula to find the new
balance after each payment:
New Balance = (Old Balance) × (1 + i) − Payment.
The initial key sequence would be:
1.01 vvv1000
For each payment, continue with:
*100-
Balance after six payments: $446.32.
3. Store 100 in R
5
. Then:
1. Divide the contents of R
5
by 25.
2. Subtract 2 from the contents of R
5
.
3. Multiply the contents of R
5
by 0.75.
4. Add 1.75 to the contents of R
5
.
5. Recall the contents of R
5
.
Answer: 3.2500.
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