The company Los Duros, Inc. had the following activities during the year: (The hard workers want to compare the difference in final inventory between the three method of Cost (Average, FIFO, LIFO) but considering the two Perpetual and Periodic systems. The whole process and present the comparison. 1. January 01 Initial inventory 100 units at $ 30 2. April 01 Bought 200 units at $ 44 3. May 01 sold 50 units 4. Sept. 01 Purchased 150 units at $ 22 Oct. 01 sold 50 units Please explain each step in excel