HP 12c financial calculator Manuale Utente

Pagina di 211
34  Section 3: Basic Financial Functions 
 
File name: hp 12c_user's guide_English_HDPMBF12E44 
Page: 34 of 209   
Printered Date: 2005/7/29   
Dimension: 14.8 cm x 21 cm 
 
Keystrokes Display 
 
7¼ 
7.00 
Stores the annual interest rate. 
450Þ$ 
–450.00 
Stores the principal. 
fÏ 
5.25 
Accrued interest, 360-day basis. 
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 
 
60n 
7¼ 
450Þ$ 
60.00 
7.00 
–450.00
If you have not altered the numbers in 
the n, i, and PV registers since the 
preceding example, you may skip 
these keystrokes. 
fÏd~ 
5.18 
Accrued interest, 365-day basis. 
455.18 
Total amount: principal plus accrued 
interest. 
Financial Calculations and the Cash Flow Diagram 
The concepts and examples presented in this section are representative of a wide 
range of financial calculations. If your specific problem does not appear to be 
illustrated in the pages that follow, don’t assume that the calculator is not capable 
of solving it. Every financial calculation involves certain basic elements; but the 
terminology used to refer to these elements typically differs among the various 
segments of the business and financial communities. All you need to do is identify 
the basic elements in your problem, and then structure the problem so that it will 
be readily apparent what quantities you need to tell the calculator and what 
quantity you want to solve for. 
An invaluable aid for using your calculator in a financial calculation is the cash 
flow diagram
. This is simply a pictorial representation of the timing and direction 
of financial transactions, labeled in terms that correspond to keys on the calculator. 
The diagram begins with a horizontal line, called a time line. It represents the 
duration of a financial problem, and is divided into compounding periods. For 
example, a financial problem that transpires over 6 months with monthly 
compounding would be diagrammed like this: