Herschbach Ad Pros is a specialty retailer offering T-shirts, sweatshirts, and caps. Its most recent annual sales consisted of $15,000 of T-shirts, $11,000 of sweatshirts, and $1,800 of caps. The company is adding polo shirts to the lineup and projects that this addition will result in sales next year of $14,000 of T-shirts, $9,800 of sweatshirts, $15,000 of Polo shirts, and $2,500 of caps. What sales amount should be used when evaluating the Polo shirt project?