HP 10B - Manual (Page 134)

For each payment amortized:
INT' « BALxi (¡NT' is rounded to the current display selling;
¡NT' = 0 for period 0 in Begin mode.)
¡NT = INr (with sign oiPMT)
PRN = PMT + INr
+ PPN
E!NT^ = S/yV7^rf + ¡NT
IPRN^ - + PP^
Interest Rate Conversions
EFF% 1 +
NOM%
lOOxP/YR
r / Y R
- 1 xlOO
Cash-Flow Calculations
i% = periodic interest rate
j = the group number of the cash flow.
CFj = amount of the cash flow for group
= number of times the cash flow occurs for group j,
k = the group number of the last group of cash flows.
Nj = S m = total number of cash flows prior to group j.
\ o I J
NPV = + S CFj
X
1
-
1 +
i%
100
-"J
i%
100
X 1 +
i%
100
When NPV = 0, the solution for t% is the periodic internal rate of return.
B: More About Catculations 131