Award: $10\mathrm{.}00$ points

Problem $3-21$ Profit Margin $[$LO$4]$

In response to complaints about high prices, a grocery chain runs the following advertising campaign: $"$If you pay your child $$8$ to go buy $$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:

$\backslash$table$[[($in millions$)],[$Sales$,$$$600\mathrm{.}0$