Problem 12-38 (Algo) Demand for devil's food whipped-cream layer cake at a local pastry shop can be approximated using a Poisson distribution with a mean of 6.6 per day. The manager estimates it costs $28 to prepare each cake. Fresh cakes sell for $31. Day-old cakes sell for $28 each. Use Table C. a-1. Assume one-half of the day-old cakes are sold, and the rest thrown out. What service level is achieved in this situation? (Round your answer to 2 decimal places.) Answer is complete but not entirely correct. Service level 1.00 X a-2. What stocking level is appropriate to achieve this service level? x Answer is complete but not entirely correct. Stocking level 10