If you could move the lot size up to ship in truckload quantities, calculate the total cost for each supplier. Note: Do not round intermediate calculations. Round "Required lot size for truckload" and final answers to the nearest whole number. Use (full) truckload cost rates and the lowest (feasible) unit cost for all calculations. For example, if there are 8.3 orders per year, don't split the 8.3 orders into 8 full truckloads and 0.3 less-than-truckloads - use the full truckload rate for all 8.3 orders. For annual purchase cost, don't use two different unit costs for the 8 complete orders and the 0.3 partial orders - use the lowest (feasible) unit cost for all 8.3 purchase orders based on the lot size needed for a full truckload. Total cost Supplier 1 Supplier 2