In response to complaints about high prices, a grocery chain runs the following advertising campaign: If you pay your child $2 to go buy $50 worth of groceries, then your child makes twice as much on the trip as we do." You've collected the following information from the grocery chain's financial statements: (in millions) Sales Net income Total assets Total debt $685.00 13.70 365.00 229.80 a. What is the child's profit margin? (Do not round intermediate calculations and enter your answer as a percent rounded to the nearest whole number, e.g., 32.) b. What is the store's profit margin? (Do not round intermediate calculations and enter your answer as a percent rounded to the nearest whole number, e.g., 32.) c. What is the ROE? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a. Child's profit margin b. Store's profit margin c. ROE