Heritage Company manufactures a beautiful bookcase that enjoys widespread popularity. The company has a backlog of orders that is large enough to keep production going indefinitely at the plant$$s full capacity of $4,000$ bookcases per year. Annual cost data at full capacity follow:Heritage Company manufactures a beautiful bookcase that enjoys widespread popularity. The company has a backlog of orders that is large enough to keep production going indefinitely at the plant$$s full capacity of $4,000$ bookcases per year. The president$$s next$-$door neighbor has considered making himself a bookcase and has priced the necessary materials at a building supply store. He has asked the president whether he could purchase a bookcase from the Heritage Company $$at cost$,$ and the president has agreed to let him do so$.$