Jan wants to paint her bedroom that measures 15 feet wide, 20 feet long, and 8 feet high. One gallon of the paint she selects covers 400 square feet and costs $18 per gallon. The sales tax is 7.5%. She plans to paint the four walls and the ceiling with the same paint. (She ignores the area of the two windows and the door into the room when she estimates the amount of paint she needs.) a) How many gallons of paint should she buy? (Round to nearest hundredths.)

b) How much will the paint cost, including sales tax. (Round to nearest penny.)