# CPI Frequency Flag - Formula Simplication

#### Superhick

##### New Member
Hi there,

I want to simplify an excessively long nested IF(OR formula; can anyone help?

Here is the formula:
=IF(OR(I\$6=\$F15+\$H15,I\$6=\$F15+\$H15*2,I\$6=\$F15+\$H15*3,I\$6=\$F15+\$H15*4,I\$6=\$F15+\$H15*5,I\$6=\$F15+\$H15*6,I\$6=\$F15+\$H15*7,I\$6=\$F15+\$H15*8,I\$6=\$F15+\$H15*9,I\$6=\$F15+\$H15*10),1,0)

I have attached a screenshot of what I'm trying to do. I am building a rent forecast model, and want to apply inflation. However, inflation could be every 2 years, or every 3 years etc. as specified. My formula only applies CPI after the start year, and then applies CPI at the frequency specified. However, I would need 20 or more OR formulas for my formula to forecast out 20+ years, but I'm sure there is a more graceful and compact formula to do the job. I'm just not sure how to do it.

Appreciative of anyone's help. Thanks very much

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#### StephenCrump

##### MrExcel MVP
Welcome to the Forum!

Perhaps something like this:

ABCDEFGHIJKLMNOPQRSTUVWXYZAAAB
1
2
3
4
5
620152016201720182019202020212022202320242025202620272028202920302031203220332034
7
8
9
10CPI2.0%
11
12
13
14Start YearAmountFrequency
1520181,000.001   1,000.001,020.001,040.401,061.211,082.431,104.081,126.161,148.691,171.661,195.091,218.991,243.371,268.241,293.611,319.481,345.871,372.79
1620172,000.001  2,000.002,040.002,080.802,122.422,164.862,208.162,252.322,297.372,343.322,390.192,437.992,486.752,536.482,587.212,638.962,691.742,745.572,800.48
1720171,000.001  1,000.001,020.001,040.401,061.211,082.431,104.081,126.161,148.691,171.661,195.091,218.991,243.371,268.241,293.611,319.481,345.871,372.791,400.24
1820162,000.002 2,000.002,000.002,040.002,040.002,080.802,080.802,122.422,122.422,164.862,164.862,208.162,208.162,252.322,252.322,297.372,297.372,343.322,343.322,390.19
1920161,000.002 1,000.001,000.001,020.001,020.001,040.401,040.401,061.211,061.211,082.431,082.431,104.081,104.081,126.161,126.161,148.691,148.691,171.661,171.661,195.09
2020252,000.003          2,000.002,000.002,000.002,040.002,040.002,040.002,080.802,080.802,080.802,122.42
2120181,000.005   1,000.001,000.001,000.001,000.001,000.001,020.001,020.001,020.001,020.001,020.001,040.401,040.401,040.401,040.401,040.401,061.211,061.21
2220212,000.005      2,000.002,000.002,000.002,000.002,000.002,040.002,040.002,040.002,040.002,040.002,080.802,080.802,080.802,080.80
2320171,000.007  1,000.001,000.001,000.001,000.001,000.001,000.001,000.001,020.001,020.001,020.001,020.001,020.001,020.001,020.001,040.401,040.401,040.401,040.40
2420172,000.008  2,000.002,000.002,000.002,000.002,000.002,000.002,000.002,000.002,040.002,040.002,040.002,040.002,040.002,040.002,040.002,040.002,080.802,080.80
Sheet1
Cell Formulas
RangeFormula
I15:AB24I15=IF(I\$6>=\$F15,\$G15*(1+CPI)^INT((I\$6-\$F15)/\$H15),"")
Named Ranges
NameRefers ToCells
CPI=Sheet1!\$G\$10I15:AB24

I15: =IF(AND(I\$6>\$F15,MOD(I\$6-\$F15,\$H15)=0),1,"")

#### Superhick

##### New Member
That is perfectly elegant and what I was hoping for, thank you very much Stephen!

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