Company: McDonald's Corporation McDonald's Corporation operates a chain of fast-food restaurants worldwide. For the month of December, the company incurred the following costs related to one of its branches:

• Food and beverage costs: $20,000
• Labor costs: $15,000
• Occupancy costs: $5,000
• Other operating expenses: $10,000 Calculate the branch's contribution margin, operating income, and operating income percentage if the branch generated $50,000 in revenue.