To find the answer, subtract the total cost of producing the shoe from the total revenue (money made) to find the profit (money made after repaying the cost).
If the question below asks you which one you should choose, keep in mind that just because there are higher profits <em>does not mean</em> you should choose the choice (with the highest). This would decrease the likely-hood that a consumer would buy it (as it is too expensive), and lower your consumer pool. Instead, choose one that is towards the middle.
First you would have to figure out what 3 times the width is which would be the 3w part then to fine the length you would subtract 5 since it is 5 inches shorter