Demand for devil's food whipped-cream loyer cake at a local pastry shop can be approximated using a Poisson distribution with o mean of 5 per day. The manoger estimates it costs $20 to prepare each cake. Fresh cakes sell for $23, Day-old cakes sell for $20 each. Use Tablec 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.) a.2. What stocking level is appropriate to achieve this service level? Demand for devil's food whipped-cream loyer cake at a local pastry shop can be approximated using a Poisson distribution with o mean of 5 per day. The manoger estimates it costs $20 to prepare each cake. Fresh cakes sell for $23, Day-old cakes sell for $20 each. Use Tablec 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.) a.2. What stocking level is appropriate to achieve this service level