Can someone explain the excel commands for this problem?

Amanufacturing firm has been offered a particular component part is uses according with a discount pricing schedule provided by the supplier. The manufacturing company uses 1,000 of the components annually, the annual carrying cost is 3.30% of the unit cost, and the ordering cost is $60. Determine the amount the firm should order to minimize the total annual cost. Order Quantity Price EOQ Feasible EOQ Total Cost Annual Demand 1-199 $ 65.00 Ordering Cost Inventory Cost $ 62.50 200-249 250-299 $ 59.00 300+ S 57.00 Optimum Order Quantity rounded to whole units (no decimals)