S 21.11 Blue Paper Delivery has decided to analyze the profitability of four customers. It buys recycled paper at per case and sells to retail customers at a retail price. Data pertaining to the four customers are: Customer 1 2 3 4 Cases sold 3,150 6,300 9,450 6,930 Retail selling price $ 31.50 $ 29.935 28.35 $ 26.78 Number of purchase orders 95 47 142 189 Number of customer visits 12 24 47 177 Miles traveled 3,721 11,163 16,744 5,209 Blue Paper Delivery three activities and their cost drivers are: Activity Cost Driver Rate Order taking $ 75.60 per purchase order Customer Visits $ 52.92 per customer visit Deliveries $ 6.30 per delivery mile traveled Requirements 1 Compute customer-level operating income of each customer. 2 Rank customers on their customer-level operating income. Perform cumulative customer level operating income analysis by computing cumulative customer level income as a percentage of total operating income. Comment on the results. 3 Advise whether the company should drop any customers). Explain