HP 12C User Manual page 66

66 Section 3: Basic Financial Functions
Keystrokes
(ALG mode)
2.152004}
3.012004
gÒ
~
z30+
36n
5gC
4500$
P
Example 2: A 42-month loan of $3,950 for a used car began accruing interest
on July 19, 2004, so that the first period began on August 1, 2004. Payments of
$120 are made at the end of each month. Calculate the annual percentage rate
(APR), using the actual number of odd days and simple interest for the odd period.
Keystrokes
(RPN mode)
fCLEARG
?Æ
7.192004\
8.012004
gÒ
30z
File name: hp 12c pt_user's guide_English_HDPMF123E27
Printed Date: 2005/8/1
Display
2.15
Keys in the date interest begins
accruing and separates it from the
next date entered.
3.012004
Keys in the date of the beginning of
the first period.
15.00
Actual number of odd days.
16.00
Number of odd days counted on the
basis of a 30-day month.
0.53
Divides by the length of a monthly
period to get the fractional part of n.
36.53
Adds the fractional part of n to the
number of complete payment
periods, then stores the result in n.
0.42
Calculates and stores i.
4,500.00
Stores PV.
–135.17
Monthly payment.
Display
Clears financial registers.
Turns off the C indicator in the
display, so that simple interest will be
used for the odd period.
7.19
Keys in the date interest begins
accruing and separates it from the
next date entered.
8.012004
Keys in the date of the beginning of
the first period.
13.00
Actual number of odd days.
0.43
Divides by the length of a monthly
period to get the fractional part of n.
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Dimension: 14.8 cm x 21 cm