PROBLEMS their lifet 1. From the information given below, rank the customers in terms of AVG. ANNUAL SALES AVG. PROFIT MARGIN EXPECTED LIFETIME Customer A Customer B Customer C 2,500 4,000 5 1,200 1796 1296 8 years 6 years 12 years Use a discount rate of 6 percent and treat the average annual sales figures as annuifties Should any of these customers be fired