why is FIFO wrong? and give me the right answer please

Crane Company Inc. had a beginning inventory of 130 units of Product RST at a cost of $8 per unit. During the year, purchases were: Crane Company uses a periodic inventory system. Sales totaled 1,570 units. 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 $ Determine the ending inventory and the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). (Round answers to 0 decimal places, e.g. 150.)