Final answer:
McDonald's makes $12,000 selling fries in one day.
Step-by-step explanation:
To find out how much McDonald's makes selling fries in one day, we can use the information that 40% of their sales comes from fries. We know that they make $7200 from items other than fries in one day. Since the remaining percentage (60%) represents the sales from other items, we can set up the equation: 60% = $7200. To solve for the total sales, we need to divide $7200 by 60% (or 0.60) to find the full amount of sales in one day. This gives us $12,000. Therefore, McDonald's makes $12,000 selling fries in one day.