Candace needs to paint the exterior walls of a large rectangular barn. The length of the barn is 80 feet, the width is 50 feet, and the height is 30 feet. The paint costs $28 per gallon, and each gallon covers 420 square feet. How much will it cost Candace to buy enough paint to paint the barn? Explain your work. (Hint: Carefully consider which sides of the barn will need paint.) Draw pictures, show math, and/or use words to explain your thinking.
