In response to complaints about high prices, a grocery chain runs the following advertising campaign: "If you pay your child $1 to go buy $32 worth of groceries, then your child makes about twice as much on the trip as we do." You've collected the following information from the grocery chain's financial statements: (millions) 762.00 Sales $ Net income 11.85 340.00 Total assets 154.50 Total debt a. What is the child's profit margin? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What is the store's profit margin? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c. What is the store's ROE? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Answer is complete but not entirely correct. a. Child's profit margin 3.13 % b. Store's profit margin 1.56 % C. Store's ROE 0.62 %