Determination of Order Quantity

"Jim uses a fixed order interval approach to managing his inventory of corn chip bags (i.e., Jim order more bags on the 1st of each month). Jim doesn't know demand with certainty, but he usually ranges from 2500 to 4500 bags, so he keeps 5000 bags in stock. Last month Jim used 4270 bags. Using the fixed order interval approach, how many bags will Jim order this month? a. 730 b. 5,000 c. 4,270 d. Not enough information to answer the question. "