Casio CLASSPAD 330 3.04 - Manual (Page 849)

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S\ IRR
IRR is calculated using Newton’s Method.
In this formula, NPV = 0, and the value of IRR is equivalent to i s
noted, however, that minute fractional values tend to accumulate during the subsequent
calculations performed automatically by the calculator, so NPV never actually reaches
exactly zero. IRR becomes more accurate the closer that NPV approaches to zero.
S\ PBP
n: Smallest positive integer that satisfies the conditions
NPV n  0, NPV n +1
0, or 0.
15-4-4
Cash Flow
PBP =
NPV
n
=

{ 0 .................................. ( CF
0
> 0)
n –
NPV
n
n
k = 0
NPV
n +1
– NPV
n
CF
k
(1 + i ) k
(Other than those above) ...
0 = CF
0
+ + + + .... +
(1+ i )
CF
1
(1+ i ) 2
CF
2
(1+ i ) 3
CF
3
(1+ i ) n
CF
n
NPV = CF
0
+ + + +
(1+ i )
CF
1
(1+ i ) 2
CF
2
(1+ i ) 3
CF
3
(1+ i ) n
CF
n .... + i =
100
I %
NFV = NPV
× (1 + i )
n
Calculation Formulas
S\ NPV
n: natural number up to 79
S\ NFV