Return On Investment Calculator
Subscription Cost:  $ The cost of your mobile marketing per month.
Number of Subscribers:     The size of your mobile list.
Campaigns Per Month:     The amount of times you send to your list monthly.
Average Read Rate:     % The average read rate is 94%.
Est. Response Rate:     % Response rates range from 3% to 90%.
Average Spend:  $ Average cost per item you sell. Ex. $24.95