Delta Company produces a single product. The cost of producing and selling a single unit of this product at the company's normal activity level of 9,000 units per year is: Direct materials $2.50 Direct labor $4.00 Variable manufacturing overhead $1.00 Fixed manufacturing overhead $4.45 Variable selling and administrative expense $2.10 Fixed selling and administrative expense $3.00 The normal selling price is $18 per unit. The company's capacity is 17,000 units per year. An order has been received from a mail-order house for 2,300 units at a special price of $17 per unit. This order would not affect regular sales. Assume the company has 1,000 units of this product left over from last year that are inferior to the current model. The units must be sold through regular channels at reduced prices. What unit cost is relevant for establishing a minimum selling price for these units? (Round your answer to 2 decimal places)