Average Demand for a Particular Item Is 1,200 Units Per

Multiple Choice

Average demand for a particular item is 1,200 units per year. It costs $100 to place an order for this item, and it costs $24 to hold one unit of this item in inventory for one year. If the fixed-order-interval model is chosen in this instance, how often (on average) will this item be ordered?

A) once a month
B) once every other month
C) twice a month
D) twice every three months
E) three times every two months