Accounts 50000 0-due 40000 1-due 4000 2-due 4000 3-due 2000 Letter 20 min Phone 40 min Nothin 0 min Value 10,000 Payment Categories Time Constraint From\\To 0-due 1-due 2-due 3-due Total Contacts Minutes Hrs Letter 0 4000 0 4000 80000 1333 hrs Phone Call 4000 1500 5500 220000 3667 Nothing 0 500 500 0 0 1000 4000 2000 5000 hrs # of Accounts per Category 40000 4000 4000 2000 5000 hrs Revenue %% Yielded 1-due 2-due 3-due Letter 60% 10%% 15% 15% 40%% 20%% 60% Phone 70% 20%% 30% 25%% 30% 50% 40% Nothing 20% 25% 10%% 10%% 20% 10% 40%% Payment Amount 20,000 $ 10,000 30,000 20,000 $ 10,000 $ 20,000 $ 10,000 Revenue 0-due 1-due 2-due 3-due Letter $ 52,000,000 $ Phone 68,000,000 21,000,000 Nothing 400,000,000 3,000,000 Category Total 400,000,000 52,000,000 68,000,000 24,000,000 Delinquet Revenue 144,000,000 Total 544,000,000