In: Operations Management
Bob oversees purchasing surgical supplies for a Hospital. Sam is evaluating scalpels for the hospital's surgical use. The quantity—price schedules for X is given in the following table. The annual demand for scalpels is 10,000 units. The ordering cost is $150 per order and the annual carrying cost is $1.95 per unit.
X |
|
Quantity Ordered |
Price per unit (in U.S. dollars) |
0 to 2,999 |
10.00 |
3,000 to 4,999 |
9.75 |
5,000 to 7,999 |
9.25 |
8,000+ |
9.00 |
What is the economic order quantity that should be ordered from
X?
Annual demand, D = 10,000 units
The ordering cost, S = $150 per order
Annual carrying cost, H = $1.95 per unit
EOQ = sqrt(2DS/H)
= sqrt(2*10000*150/1.95)
= 1240 units
For this quantity, unit price, c = $ 10
Total annual cost = Purchase cost + Ordering cost + Carrying cost
= D*c+S*D/Q+H*Q/2
= 10000*10+150*10000/1240+1.95*1240/2
= $ 102,419
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For unit price, c = $ 9.75, MOQ = 3000 units
Total annual cost = 10000*9.75+150*10000/3000+1.95*3000/2
= $ 100,925
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For unit price, c = $ 9.25, MOQ = 5000 units
Total annual cost = 10000*9.25+150*10000/5000+1.95*5000/2
= $ 97,675
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For unit price, c = $ 9.00, MOQ = 8000 units
Total annual cost = 10000*9.00+150*10000/8000+1.95*8000/2
= $ 97,987.5
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Lowest total annual cost is $ 97,675 for order quantity of 5000 units
Therefore, economic order quantity that should be order from McKesson = 5,000 units