In response to complaints about high prices, a grocery chain runs the following advertising campaign: If you pay your child $1 to go buy $31 worth of groceries, then your child makes about twice as much on the trip as we do. Youve collected the following information from the grocery chains financial statements: (millions) Sales $ 772.00 Net income 12.35 Total assets 365.00 Total debt 157.00

What is the childs profit margin? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

What is the stores profit margin? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

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.)