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Sarah\'s Organic Soap Company makes organic liquid soap. One of the raw material

ID: 359859 • Letter: S

Question

Sarah's Organic Soap Company makes organic liquid soap. One of the raw materials for her soaps is organic palm oil. She needs 1200 kgs of palm oil per day on average. The supplier charges a $62 delivery fee per order (which is independent of the order size) and $5 per kg. Sarah's annual holding cost is 15%. Assume she operates and sells 5 days per week, 52 weeks per year. If Sarah wants to minimize her annual ordering and inventory holding costs, how much palm oil should she purchase with each order (in kgs)? kgs (Round to nearest integer.) h If Sarah orders 4500 kgs with each order, what would be the annual sum of b. ordering and holding costs? (Round your answer to 3 decimal places.) If Sarah orders 8500 kgs with each order, what would be sum of ordering and holding costs per kg sold? hee per kg Sarah's supplier is willing to sell her palm oil at a 5% discount if she d. purchases 15,000 kgs at a time. If she were to purchase 15,000 kgs per order what would be her annual sum of ordering and holding costs?

Explanation / Answer

1) Daily demand = 1200 kgs kgs

Number of days in a year = 52 weeks x 5 days = 260 days

Annual demand (D)=Daily demand x number of days in a year

= 1200 x 260 = 312000 kgs

Ordering cost (S) = $62

Cost per kg = $5

Holding cost (H) = 15% of cost = 15% of $5 = $0.75

a) Economic order quantity = sqrt of (2DS / H)

= sqrt of [(2 x 312000 x 62) / 0.75]

= 7182 kgs

So if Sara wants to minimize her annual Ordering and inventory holding cost, she should order 7182 kgs with each order

b) If order quantity (Q) = 4500 kgs

Ordering cost = (D/Q) S = (312000/4500)62 = $4298.667

Holding cost = (Q/2)H = (4500/2)0.75 = $1687.5

Annual sum of cost = Ordering cost + Holding cost

= $4298.667 + $1687.5

= $5986.167

c) If order quantity (Q) = 8500 kgs

Ordering cost = (D /Q) S = (312000/8500)62 = $2275.76

Holding cost = (Q/2)H = (8500/2)0.75 = $3187.5

Total annual cost = $2275.76+$3187.5 = $5463.26

Cost per kg sold = Total annual cost / D

= $5463.26 / 312000

= $0.02 per kg

d) If order quantity(Q) = 15000 kg

Cost per kg = $5 - (5% of $5) = $5 - $0.25 = $4.75

Holding cost(H) = 15% of cost = 15% of $4.75 = $0.71

Ordering cost = (D /Q) S = (312000/15000)62 = $1289.6

Holding cost =(Q/2) H = (15000/2)0.71 = $5325

Annual Sum of cost = Ordering cost + Holding cost

= $1289.6 + $5325

= $6614.6

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