1. during april, wiggins company sold 900 units of product x for $10 per unit. its beginning inventory, purchases, and sales during the month were as follows: april 1 beginning inventory 200 units @ $1 5 purchases 200 units @ $2 8 sales 300 units 10 purchases 200 units @ $3 15 purchases 200 units @ $4 18 sales 300 units 20 purchases 200 units @ $5 25 purchases 200 units @ $6 28 sales 300 units it was further noted that the ending inventory consisted of 100 units each of april 10th, april 15th, and april 25th purchases (use this data for the specific identification method only). compute the proper cost to be assigned to ending inventory, cost of goods sold, and gross margin under each of these methods using the periodic system: (a) average cost, (b) fifo, and (c) lifo.