In response to complaints about high prices, a grocery chain runs the following advertising campaign: If you pay your child $1 to go buy $30 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: (in millions) Sales $ 788.00 Net income 13.15 Total assets 405.00 Total debt 161.00 What is the childs profit margin? Note: 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? Note: 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