Q1)
Less than $50 year 0 year 1 year 2 year 3 year 4 year 5
0 1 2 3 4 5
customers 4657 4046 1918 970 927 820
revenue 148278.9 151464.8 109129.4 71418.95 68788.16 58617.59
Profit (without mailing cost) 62277.13 63615.22 45834.33 29995.96 28891.03 24619.39
mailing cost 3958.45 27942 27942 27942 27942 27942
net profit 58318.68 35673.22 17892.33 2053.959 949.0272 -3322.61
discount 0.1 0.1 0.1 0.1 0.1 0.1
npv profit 58318.68 32430.2 14787.05 1543.17 648.1983 -2063.08
cumulative 58318.68 90748.88 105535.9 107079.1 ...