3) Consider the six costs that follow. 1. Advertising and promotion costs of a do-it-yourself retailer 2. Surgical supplies used in a hospital's operating room 3. Aircraft depreciation charges of an airline 4. Utility charges that include a minimum-use fee, for a small business 5. Annual business licensing fee paid by a daycare center 6. Truck fuel consumed by a road construction company Required: A. Classify each of these costs as variable, committed fixed, discretionary fixed, or semivariable