Cheeseburger and Taco Company purchases 14,515 boxes of cheese each year. It costs $29 to place and ship each order and $6.68 per year for each box held as inventory. The company is using Economic Order Quantity model in placing the orders.
Use the formula.
If you have no access to your notes, books or any websites other than AB then here it is:
EOQ = SQRT(2 × Quantity × Cost Per Order / Carrying Cost Per Order)
Substitute your numbers in and Bob's your uncle