:TITLES
  1 "PLAN80 EXAMPLE #5 - INTERACTIVE"
  2 "INTERNAL RATE OF RETURN MODEL"
  3 "(DISCOUNTED CASH FLOW)"
:COLUMNS
  INVEST
  INCOME
  DCF
:ROWS
  P01
  P02
  P03
  P04
  P05
  P06
  P07
  P08
  P09
  P10
  P11
  P12
  TOTAL  " " "TOTAL"
:OPTIONS
  ROWWID(5)
:DATA
  INVEST  =  400
  INCOME  =    0  100 +
:INTERACTIVE
:RULES
  TOTAL  =  0
  DCF    =  @IRR((INCOME-INVEST))
  TOTAL  =  @SUM(P01..P12)
:DISPLAY
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