im still confused

inventory methods (LO6-3, 6-4, 6-5) [The following information applies to the questions displayed below] Greg's Bicycle Shop has the following transactions related to its top-selling Mongoose mountain bike for the month of March. Greg's Bicycle Shop uses a periodic inventory system. For the specific identification method, the March 5 sale consists of bikes from beginning inventory, the March 17 sale consists of bikes from the March 9 purchase, and the March 27 sale consists of four bikes from beginning inventory and eight bikes from the March 22 purchase. Problem 6-2A Part 2 2. Using FIFO, caiculate ending liwentory and cost of goods sold at March 31