Bramble Corp. Inc. had a beginning inventory of 100 units of Product RST at a cost of $8 per unit. During the year, purchases were: Feb. 20 610 units at Aug. 12 385 units at $9 $10 $11 $12 May 5 485 units at Dec. 8 100 units at Bramble Corp. uses a periodic inventory system. Sales totaled 1,440 units. (a) Determine the cost of goods available for sale. The cost of goods available for sale $