HP 12c Platinum Reference Manual page 123

Program Instructions:
1. Key in the program.
2. Press f CLEAR G .
3. Key in the annual interest rate and press gC .
4. Key in the term of the loan in years and press gA .
5. Key in the purchase price and press ? 1.
6. Key in the percent down and press ? 2.
7. Key in the tax rate in dollars per thousand and press ? 3.
8. To calculate the approximate monthly payment, press t .
9. For a new case, store only the new variables by performing steps 3 thru 7 as needed.
Press t for the new approximate monthly payment.
Example: Solve the previous example using the HP 12C Platinum program.
12c platinum / 12C
RPN Keystrokes
fCLEARG
10.75gC
35gA
65000?1
10?2
25?3
t
What would the approximate payment be if the loan was at 10% interest?
12c platinum / 12C
RPN Keystrokes
10gCt
What if the down payment is increased to 20%?
12c platinum / 12C
RPN Keystrokes
20?2t
12c platinum
ALG Keystrokes
fCLEARG
10.75gC
35gA
65000?1
10?2
25?3
t
12c platinum
ALG Keystrokes
10gCt
12c platinum
ALG Keystrokes
20?2t
Personal Finance
Display
Monthly interest.
0.90
Months of loan.
420.00
Purchase price.
65,000.00
Percent down.
10.00
Tax rate per thousand.
25.00
Approximate monthly
-672.16
payment.
Display
Approximate monthly
-638.33
payment.
Display
Approximate monthly
-582.45
payment.
123
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