Shirts Inc. sells tees, oxfords, and chambrays. Its most recent annual sales consisted of $20,000 tees, $15,000 of oxfords, and $6,000 of chambrays. The company is adding polos to the lineup and projects that this addition will result in a shift in demand for products. Sales next year are projected at $17,000 of tees, $13,000 of oxfords, $4,000 of chambrays, and $14,000 polo shirts. All changes are attributed to the polo introduction. What sales amount should be used when evaluating the polo shirt project?

4,000

14,000

12,000

7,000

10,000