Demand for carpet cleaning machines is shown in the table. The machines cost $50 each per day to stock, and can be rented for $60 per day. If a machine is not rented, it can be stored for $49 each. The probability of demand is shown in the table. Using a decision table, determine the expected cost for each stocking level. What is the service level? Use the ratio method.

Demand for carpet cleaning machines is shown in the table. The machines cost $50 each per day to stock, and can be rented for $60 per day. If a machine is not rented, it can be stored for $49 each. The probability of demand is shown in the table. Using a decision table, determine the expected cost for each stocking level. What is the service level? Use the ratio method. Machine Demand Probability Cumulative Probability Total Expected Cost (00.00) 0 0.3 0.3 $ 1 0.2 0.5 2 0.3 0.8 3 0.2 1 $ Service Level (SL) using the ratio method (express as a whole percentage): % How many machines should be stocked