Contribution Margin and Contribution Margin Ratio For a recent year, McDonald's (MCO) company-owned restaurants had the following sales and expenses (in Millions): Sales $28,500 Food and packaging $(12,535) Payroll (7.200) Occupancy (rent, depreciation, etc.) (3,815) General, selling, and administrative expenses (4.100) $(27,650) Operating Income $850 Assume that the variable costs consist of food and packaging, payroll, and 40% of the general, selling, and administrative expenses