Help me solve these three problems. Thank you

14 Assume Shopping.com began September with 16 units of inventory that cost a total of $320. During September, Shopping.com purchased and sold goods as follows: Sep. 8 Purchase 48 units $21 Sale 40 units @ $42 22 Purchase 32 units @ $23 27 Sale 48 units @ $42 Under the FIFO inventory costing method and the perpetual inventory system, how much is Shopping.com's cost of goods sold for the sale on September 14? O A. $840 OB. $1,328 C. $824 OD. $1,680 Assume Shopping.com began July with 8 units of inventory that cost a total of $152. During July, Shopping.com purchased and sold goods as follows: Jul 8 Purchase 24 units 520 14 Sale 20 units 540 22 Purchase 16 units $22 27 Sale 24 units 540 Suppose Shopping.com used the weighted average Inventory costing method and the perpetual inventory system Compute the weighted average unit cost of the company's inventory on hand at July 8. Round weighted average un cost to the nearest cent. OA $19.75 OB. $21.00 OG $19.50 OD. Cannot be determined from the data given 14 Assume Nile.com began October with 14 units of inventory that cost a total of $224. During October, Nile.com purchased and sold goods as follows: Oct. 8 Purchase 42 units @ $17 Sale 35 units @ $34 22 Purchase 28 units @ $19 27 Sale 42 units $34 Suppose Nile.com used the LIFO inventory costing method and the periodic Inventory system Using the information above, determine Nile.com's cost of goods sold at the end of the month. O A. $1,358 OB, 5112 OC. $1,337 OD. $133