What are the answers for these questions and please explain.

{The foiiomng information applies to the questions displayed beiowui Greg's Bicycle Shop has the following transactions related to its top-selling Mongoose mountain bike {or the mon'm of March. Greg's Bicycle Shop uses a periodic inventory system. Cost per Dane Transactions Unlts Unit Total Cost March 1 Beginning Inventory 20 $210 $ 4200 March 5 Sale [$320 each) 15 March 9 Purchase 10 230 2300 March 17 Sale [$370 each) 8 March 22 Purchase 10 240 2,400 March 27 Sale [$395 each} 12 March 30 Purchase 1" 260 1,820 $10720 Required: 1. Calculate ending inventory and cost of goods sold at March 31, using the specic identication method. The March 5 sale consists of bikes from beginning inventory, the March 1? sale consists of bikes from the March 9 purchase, and the March 2'! sale consists of four bikes ti'om beginning inventory and eight bikes from the March 22 purchase. Ending inventory Cost of goods sold 2. Using FIFD1 calculate ending inure ntonr and cost of goods sold at March 31. Ending inventory _ Cost of goods sold _ 3. Using LIFD, calculate ending inure ntoryr and cost of goods sold at March 31. Ending inventory _ Cost of goods sold _ 4. Using weighted-average cost, calculate ending inventory and cost of goods sold at Ma reh 3'1. Ending inventory _ Cost of goods sold _ 5. Calculate sales revenue and gross prot under each at the four methedemol