Culver Company Inc. had a beginning inventory of 90 units of Product RST at a cost of $5 per unit. During the year, purchases were: Culver Company uses a periodic inventory system. Sales totaled 1,350 units. (a) Your answer is correct. Determine the cost of goods available for sale. The cost of goods available for sale Determine the ending inventory and the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). (For calculation purposes, round average cost to 2 decimal places, eg. 5.25. Round answers to 0 decimal places, e.g. 125.)