Profit of Selecting All

• Profit of contacting all with the offer is

  Profit(All) = NTB - NC = N (TB - C)
  

• Profit > 0 if TB > C or K = TB/C > 1

  K = expected Benefit/Cost ratio of a random contact
  

• For N, T, B, C above, K = 0.6

  Profit(All) = -$2,000,000
  

• Can we improve profit by selecting a subset ?

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