Scenario 9.10 the Dolly Llama Farm Keeps an Average of 50 of 50

Multiple Choice

Scenario 9.10
The Dolly Llama Farm keeps an average of 50 of those funny creatures on hand and each consumes a pound of grain a day, 365 days per year. Grain costs $12 for a 50 pound bag and it costs the farm $10 to make a run to the feed store to pick up an order, regardless of order size. It takes the feed store four days to acquire, mix, and bag the special blend of grains necessary to make the feed the Dolly Llama Farm prefers. Storage costs for the feed runs 15% of the unit cost as the cost of money, loss due to critters, and spoilage all add up.
-Refer to Scenario 9.10. What should the reorder point be if demand and lead time are invariant and the farm desires a 90% service level?

A) two bags
B) four bags
C) six bags
D) eight bags