information from the grocery chain's financial statements:

$\backslash$table$[[($in millions$)],[$Sales$,768\mathrm{.}00,],[$Net income,$12\mathrm{.}15,],[$Total assets,$355\mathrm{.}00,],[$Total debt,$156\mathrm{.}00,]]$

a$.$ What is the child's profit margin?

Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

b$.$ What is the store's profit margin?

Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

c$.$ What is the store's ROE?

Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$\backslash$table$[[$a$.$ Child's profit margin,$3\mathrm{.}12,\%$