Miller's Quarter Horse Company has sales of $4,500,000. It also has invested assets of $2,500,000 and operating expenses of $3,800,000. The company has established a minimum return of 7%. Round percentages and investment turnover to one decimal place.

a. What is Miller's profit margin?

b. What is the investment turnover?

c. What is the rate of return on investment?

d. What is Miller's residual income?