Question: Work problem 12 from your text only change her holding costs to a 40% inventory cost. 12. Tammi's Truck Stop sells Seat-o-Nails cushions, which are

Work problem 12 from your text only change her holding costs to a 40% inventory cost.Work problem 12 from your text only change her

12. Tammi's Truck Stop sells Seat-o-Nails cushions, which are specially designed to keep drivers awake on the road. Her accessories supplier makes deliveries every Tuesday, at which times she can get as many cushions as she wants (the supplier always has extras in his truck). Tammi, who was a statistics major in college, has done some calculations and estimates that weekly demand for cushions is normally distributed with mean 35 and standard deviation 10. The cushions cost her $40 wholesale and she sells them for $65. Tammi uses a 35 percent interest rate to evaluate the cost of holding inventory. It is Tuesday, she has 12 cushions in stock and the supplier has just arrived. (a) How many cushions should Tammi buy if sales are lost when she runs out of stock during the week? (b) How many cushions should Tammi buy if a customer who wants a cushion will still buy it when stock has run out, but she has to pay the $5 postage to mail it to the customer

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