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Problem 10-27 (Algorithmic) ly at a particular supermarket. The product, which c

ID: 383593 • Letter: P

Question

Problem 10-27 (Algorithmic) ly at a particular supermarket. The product, which costs $1.23 per unit, sells for $1.74 per unit. If units are unsold at the end of the day A perishable dairy product is ordered dail the supplier takes them back at a rebate of $1 per unit. Assume that daily demand is ap proximately normally distributed with -145 and = 25. Note: Use Appendix B to identify the areas for the standard normal distribution a. What is your recommended daily order quantity for the supermarket? Round your answer to the nearest whole number b. What is the probability that the supermarket will sell all the units it orders? Round your answer to three decimal places. . In problems such as these, why would the supplier offer a rebate as high as $17 For example, why not offer a nominal rebate of, say, 25 per unit? What happens to the ) supermarket order quantity as the rebate is reduced? the quantity that the supermarket should order decreases

Explanation / Answer

Cost of product = C = $ 1.23 / unit

Selling price of the product = P = $1.74 / unit

Salvage price = S = $1.23 - $1 ( rebate) = $0.23

Thus,

Underage cost = Cu = P – C = $1.74 - $1.23 = $0.51

Overage cost = Co = C – S = $1.23 - $0.23 = $1

Therefore,

Critical ratio = Cu/ (Cu + Co) = 0.51 / ( 0.51 + 1) = 0.51/1.51 = 0.3377

Thus probability of optimum order quantity = 0.3377

Corresponding Z value for probability 0.3377 = NORMSINV ( 0.3377) = - 0.4187

Thus daily optimum order quantity for the supermarket

= Mean demand + Zvalue x Standard deviation of demand

= 145 – 0.4187 x 25

= 145 – 10.4675

= 134.53 ( 135 rounded to nearest whole number )

Probability that supermarket will sell all it orders = 0.3377

DAILY OPTIMUM ORDER QUANTITY = 135

PROBABILITY THAT SUPERMARKET WILL SELL ALL IT ORDERS = 0.3377

Revised scenario under rebate of 25 cents per unit :

Cost of product = C = $ 1.23 / unit

Selling price of the product = P = $1.74 / unit

Salvage price = S = $1.23 - $0.25 ( rebate) = $0.98 / unit

Thus,

Underage cost = Cu = P – C = $1.74 - $1.23 = $0.51

Overage cost = Co = C – S = $1.23 - $0.98 = $0.25

Therefore,

Critical ratio = Cu/ (Cu + Co) = 0.51 / ( 0.51 + 0.25) = 0.51/0.76 = 0.6710

Thus probability of optimum order quantity = 0.6710

Corresponding Z value for probability 0.6710 = NORMSINV ( 0.6710) = 0.4426

The revised optimum order quantity for the supermarket

= Mean demand + Z value x Standard deviation of demand

= 145 + 0.4426 x 25

= 145 + 11.065

= 156.065 ( 156 rounded to nearest whole number )

Thus with reduction of rebate to $0.25 / unit , optimum order quantity increases from 135 to 156

THE HIGHER REBATE DECREASE THE QUANTITY SUERMARKET SHOULD ORDER

DAILY OPTIMUM ORDER QUANTITY = 135

PROBABILITY THAT SUPERMARKET WILL SELL ALL IT ORDERS = 0.3377

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