The Suspenders Division of T's Fine Menswear had the following results last year. Sales $5,100,000 Operating income $510,000 Total assets $3,000,000 Current liabilities $260,000 Management's target rate of return is 20% and the weighted average cost of capital is 16%. What is the Suspenders Division's sales margin? A. 17% B. 5.1% C. 170% D. 10%