Hum-Tong's Hair Styling in Singapore has five barbers (Hun-Tong is not one of them.) Hun-Tong pays each barber $9.90 per hour. The barbers work a 40-hour week and a 50-week year, regardless of the number of haircuts. Rent and other fixed expenses are $1, 750 per month. The variable cost of supplies is $1 per haircut. Assume that the only service performed is the giving of haircuts, the unit price of which is $13. Find the contribution margin per haircut. Assume that the barbers' compensation is a fixed cost. Determine the annual break-even point, in number of haircuts. What will be the operating income if 20,000 haircuts are performed? Suppose Hun-Tong revises the compensation method. He now pays the barbers $4 per hour plus $6 for each haircut. What is the new contribution margin per haircut? What is the annual breakeven point (in number of haircuts)? Ignore requirements 3 and 4 and assume that the barbers cease to be paid by the hour but receive $7 for each haircut. What is the new' contribution margin per haircut? The annual break-even point (in number of haircuts)? Refer to requirement 5. What would be the operating income if 20,000 haircuts are performed? Compare your answer with the answer in requirement 3. Refer to requirement 5. If 20,000 haircuts are performed, at what rate of commission (that is, percentage of selling price) would Hun-Tong earn the same operating come as he earned in requirement 3