Current Attempt in Progress Waterway Company had a beginning inventory on January 1 of 180 units of Product 4-18-15 at a cost of $20 per unit. During the year, purchases were as follows. Waterway Company uses a periodic inventory system. Sales totaled 1,180 units. Your answer is correct. Determine the cost of goods available for sale. The cost of goods available for sale $ F Your answer is incorrect. Calculate average cost per unit. (Round answer to 3 decimal places, e.g. 1.250.)