In response to complaints about high prices, a grocery chain runs the following advertising campaign: "If you pay your child $4 to go buy $100 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: (millions) Sales $640.0 Net income 12.8 Total assets 370.0 Total debt 240.0 What is the profit margin for child and store? (Do not round Intermediate calculations. Enter your answers as a percent rounded to 2 decimal places, 0.9., 32.16.) Profit margin Child % Store % What is the store's ROE? (Do not round Intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32. 16.) ROE %