The Bathtub Division of Kirk Plumbing Corporation has recently approached the Faucet Division with a proposal. The Bathtub Division would like to make a special "ivory" tub with gold-plated fixtures for the company's 50-year anniversary. It would make only 4,800 of these units. It would like the Faucet Division to make the fixtures and provide them to the Bathtub Division at a transfer price of $170. If sold externally, the estimated variable cost per unit would be $140. However, by selling internally, the Faucet Division would save $9 per unit on variable selling expenses. The Faucet Division is currently operating at full capacity. Its standard unit sells for $49 per unit and has variable costs of $33.