Cullumber Center began operations on July 1. It uses a perpetual inventory system. During July, the company had the following purchases and sales. Calculate weighted-average unit cost. (Round answers to 3 decimal places, e.g. 15.251.) July 11$ July 14 July 21$ July 27$ Determine the ending inventory under a perpetual inventory system using (1) FIFO, (2) moving-average, and (3) LIFO. (For calculation and answers purpose round unit costs to 3 decimal places, e.g. 15.251 and ending inventory values to 0 decimal places, 515