ROI

 Subscribers
(Size of List)		Promotions
Per Month		Response Rate
Percentage		Avg Dollar
per Sale		Monthly RevenueAnnual Revenue
BaselineXXX=$0$0
0X0X0%X$0=$0$0
Size of List
Revenue/Mo$0$0$0$0$0
% Discount
Cost of Discount$0$0$0$0$0
Cost of Service
Net Profit/Month$0$0$0$0$0