3. Mark Chaplin is the manager of Carsen's Rib Joynt, a restaurant specializing in baby back ribs, but serving them in a very upscale atmosphere. Mark has nearly completed calculating his prime costs for the months of July, August, and September of this year. He is seeking to forecast his staff costs for the month of October. He knows the following information: Monthly Management costs Total benefits costs $42.000 20% Because his monthly management costs are fixed at $42,000 and his benefit costs are 20% of management and staffing expense, the cost of staff is the only labor-related cost he wants to estimate based on his forecasted volume. Complete Mark's prime cost recap sheet, answer the questions that follow, and then make the staff expense forecasts he needs to better predict his staff costs at the various number of guests served estimates he has identified. Carsen's Rib Joynt NUMBER OF COVERS SALES Food Beverage Total Sales July 12,000 $302,500 $62.250 August 14,500 $410,500 $85,250 September 13,000 $350,750 $65,500 $105,875 COST OF SALES Food Beverages Total Cost of Sales $143.650 $16,750 $122.750 $14,750 $13,250 LABOR Management Staff Employee Benefits Total Labor $127.000 $132,625 $130,000 PRIME COST $ $ $ (a) What is the operation's variable staff cost per guest (b) What was the operation's total variable "staff" cost in July? (c) What is the fixed portion of staff" costs? $ $ d. What will be the operation's total staft" cost if the following numbers of guests are estimated to be served in October? Variable Staff Fixed Staff Costs ($) Costs ($) Total (Mixed) Staff Cost ($) Estimated Number of Guests Served 13,250 13,500 13,750 14.000