PLEASE COMPLETE A,B,C

7) ( 6 points) During 2021, a company selts 40 units of inventory. The company has the following inventory purchase transactions for 2021 : (a) Calculate cost of goods sold and ending inventory for 2021 assuming the company uses the FIFO (first-in, first-out) method. (b) Calculate cost of goods sold and ending inventory for 2021 assurning the company uses the LIFO (last-in, first-out) method. (c) Calculate cost of goods sold and ending inventory for 2021 assuming the company uses the weighted-average cost method