HP 12c Solutions Handbook page 127

n: Term
PV: Loan
FV: 0
R : Purch. Price
1
R : Tax rate
3
1. Key in the program.
2. Press
3. Key in the annual interest rate and press
4. Key in the term of the loan in years and press
5. Key in the purchase price and press
6. Key in the percent down and press
7. Key in the tax rate in dollars per thousand and press
8. To calculate the approximate monthly payment, press
9. For a new case, store only the new variables by performing steps 3 thru 7
as needed. Press
Example: Solve the previous example using the HP-12C program..
Keystrokes
CLEAR
10.75
35
65000 1
10 2
25 3
What would the approximate payment be if the loan was at 10% interest?
10
What if the down payment is increased to 20%?
20 2
CLEAR .
for the new approximate monthly payment.
Display
0.90
420.00
65,000.00
10.00
25.00
-672.16
-638.33
-582.45
i: Interest
PMT: Loan PMT
R : Unused
0
R : % Down
2
R -R : Unused
4 .7
1.
2.
Monthly interest.
Months of loan.
Purchase price.
Percent down.
Tax rate per thousand.
Approximate monthly payment.
Approximate monthly payment.
Approximate monthly payment.
126
.
.
3.
.