Section 3: Basic Financial Functions

43

Example 1: Your good friend needs a loan to start his latest enterprise and has requested that you lend him $450 for 60 days. You lend him the money at 7% simple interest, to be calculated on a 360-day basis. What is the amount of accrued interest he will owe you in 60 days, and what is the total amount owed?

Keystrokes

Display

 

(RPN mode)

 

 

 

60n

60.00

Stores the number of days.

7¼

7.00

Stores the annual interest rate.

450Þ$

–450.00

Stores the principal.

5.25

Accrued interest, 360-day basis.

 

+

455.25

Total amount: principal plus accrued

 

 

interest.

In ALG mode, perform the steps in the RPN listing above, except replace the last step with the step below.

Keystrokes

Display

 

(ALG mode)

 

 

 

+~}

455.25

Total amount: principal plus accrued

 

 

interest.

Example 2: Your friend agrees to the 7% interest on the loan from the preceding example, but asks that you compute it on a 365-day basis rather than a 360-day basis. What is the amount of accrued interest he will owe you in 60 days, and what is the total amount owed?

Keystrokes

Display

 

(RPN mode)

 

 

 

60n

60.00

If you have not altered the numbers in

7¼

7.00

the n, i, and PV registers since the

450Þ$

–450.00

preceding example, you may skip

 

 

these keystrokes.

fÏd~

5.18

Accrued interest, 365-day basis.

 

+

455.18

Total amount: principal plus accrued

 

 

interest.

In ALG mode, perform the steps in the RPN listing above, except replace the last step with the step below.

Keystrokes

Display

 

(ALG mode)

 

 

 

+~}

455.18

Total amount: principal plus accrued

 

 

interest.

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