Algonquin Ltd. manufactures and sells only one product. Below find a partially completed schedule of the company's total and per unit costs over a relevant range of 30,000 to 50,000 units produced and sold annually. Units Produced and Sold 30,000 40,000 50,000 Total Costs: Variable costs $180,000 ? ? Fixed costs 300,000 ? ? Total Costs $480,000 ? ? Cost per unit: Variable cost ? ? ? Fixed cost ? ? ? Total Cost per Unit ? ? ?