Carla Vista Company Inc. had a beginning inventory of 115 units of Product RST at a cost of $7 per unit. During the year, purchases were: Feb. 20 660 units at $8 Aug. 12 430 units at $10 May 5 520 units at $9 Dec. 8 115 units at $11 Carla Vista Company uses a periodic inventory system. Sales totaled 1.600 units. (a) Determine the cost of goods available for sale. The cost of goods available for sale $ Calculate weighted-average cost per unit. (Round answer to 3 decimal places, e.g. 5.125.) Weighted-average cost per unit $