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	$	770.00
Net income		12.25
Total assets		360.00
Total debt		156.50

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.) Childs profit margin _____ % 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.) Stores profit margin _____ % 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.) ROE ______% ?