Question

Torrance Refinery produces approximately 20.0 Million barrels of gasoline per year. A California distributor sources its...

Torrance Refinery produces approximately 20.0 Million barrels of gasoline per year. A California distributor sources its gasoline from the Torrance refinery. The annual demand for gasoline at the California distributor is 11.1 Million barrels. The cost of storing gasoline is approximately $21 per barrel (per year). The cost of placing an order to the Torrance refinery (including shipping) is $4400 per order. Orders will be received gradually instead of delivered all at once (hence EPQ).

At what quantity will the total cost of procurement be the lowest?

Homework Answers

Answer #1

Given values:

Annual Production (P) = 20.0 Million barrels

Annual Demand (D) = 11.1 Million barrels

Cost of Holding (H) = $21 per barrel (per year)

Cost of Ordering (Co) = $4400 per order

Number of days in a year = 365 days

Daily demand (d) = Annual demand / Number of days = (11.1 x 1000000) / 365 = 30,136.99 barrels (1 Million = 1,000,000)

Daily production (p) = Annual production / Number of days = (20.0 x 1000000) / 365 = 54,794.52 barrels

Economic Production Quantity (EPQ):

EPQ = SQRT [(2 x D x Co) / H x (1 - d/p)]

EPQ = SQRT [(2 x 11.1 x 1000000 x $4400) / $21 x (1 - 30,136.99/54,794.52)]

EPQ = 102,238.19 or 102,238 (Rounding off to the nearest whole number)

Economic Production Quantity (EPQ) = 102,238 barrels or 0.102 Million barrels

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