Sharp EL-9650 - Calculation Equation Error Conditions Used by this Unit; Financial

272
APPENDIX
4. Calculation Equation Error Conditions
Used by This Unit
(1) Financial
* Define constants “r” and “s” when using in the equation below.
r= ÷ C/Y + 1 – 1 ,
1. I% calculation
1 If PMT=0
r= –1
2 If PMT≠0
f(r)=PV + (1 + r × s) × PMT× + FV × (1 + r)
–n
: (r ≠ 0)
f(r) = PV + PMT × n + FV: (r = 0)
Calculate the following for r solved in 1 and 2
I(%) = 100 × C/Y ×( (r + 1) –1)
2. PV calculation
1 If r ≠ 0, r > -1
PV = - (1 + r × s) ×× PMT –FV × ( 1 + r)
-n
2 If r=0
PV= -n × PMT –FV
3 If r ≤ -1
Error
I (%)
100
C/Y
P/Y
S=1 (Pmt_Begin)
S=0 (Pmt_End)






( )
PV
FV
–
( )
1
n
–
1–(1+r)
–n
r
P/Y
C/Y
1–(1+r)
–n
r
EL-9650-Appendix (265-281) 8/3/00, 5:06 PM272