Error conditions relating to specific tasks, Financial – Sharp EL-9900 User Manual
Page 247
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237
Appendix
5. Error Conditions Relating to Specific Tasks
1. Financial
* Define constants “r” and “s” as used in the equation below.
r =
S = 1 (Pmt_Begin)
S = 0 (Pmt_End)
(
{
}
)
÷
C/Y
+
1
–
1 ,
I (%)
100
C/Y
P/Y
1. I% calculation
1 If PMT = 0
r =
–
1
-
(
)
1
n
-
PV
FV
2 If PMT
≠ 0
f (r) = PV
+
(1
+
r
×
s)
×
PMT
×
1
–
(1
+
r)
-
n
r
+
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)
P/Y
C/Y
–
1)
2. PV calculation
1 If r
≠ 0, r >
-
1
PV =
-
(1
+
r
×
s)
×
1
–
(1
+
r)
-
n
r
×
PMT
–
FV
×
(1
+
r)
-
n
2 If r = 0
PV =
-
n
×
PMT
–
FV
3 If r
≤
-
1
Error
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