A firm maintains refrigerated trailers at Russell Stover Chocolate Inc., Kansas City, MO$.$ With standard equipment, the firm typically cleaned $450$ trailers per month. They utilized $250$ gallons of solvent, and $28$ employees work $22$ days per month, $8$ hours a day. Management has decided to switch to a larger cleaning machine. Last May, they cleaned $560$ trailers in only $15$ days. They utilized $275$ gallons of solvent, and the $28$ employees worked $7\mathrm{.}5$ hours a day.