Cost Behavior Analysis in a Restaurant: High-Low Cost Estimation Assume a Papa John's restaurant has the following information available regarding costs at representative levels of monthly sales: Monthly sales in units 5,000 8,000 10,000 Cost of food sold $10,000 $16,000 $20,000 Wages and fringe benefits 4,200 4,320 4,400 Fees paid delivery help 1,200 1,920 2,400 Rent on building 1,300 1,300 1,300 Depreciation on equipment 500 500 500 Utilities 800 920 1,000 Supplies (soap, floor wax, etc.) 200 260 300 Administrative costs 1,600 1,600 1,600 Total $19,800 $26,820 $31,500 (a) Identify each cost as being variable, fixed, or mixed. Cost of food sold Variable Wages and fringe benefits Mixed Fees paid delivery help Variable Rent on building Fixed Depreciation on equipment Fixed Utilities Mixed Supplies (soap, floor wax, etc.) Mixed Administrative costs Fixed