Western Chassis produces high$-$quality polished steel and aluminum sheeting and two lines of

industrial chassis for the rack mounting of Internet routers, modems, and other telecommunications

equipment. The contribution margin $($contribution toward profit$)$ for steel sheeting is $$0\mathrm{.}30$ per

pound and for aluminum sheeting is $$0\mathrm{.}60$ per pound. Western earns $$12$ contribution on the sale of

a Standard chassis rack and $$15$ contribution on a Deluxe chassis rack. During the next production

cycle, Western can buy and use up to $25,800$ pounds of raw unfinished steel either in sheeting or in

chassis. Similarly, $20,500$ pounds of aluminum are available.