Hello, can someone please help me with the section highlighted in green? If possible, could you also please help me with the weighted-average? Thanks!

25th Century Electronic Center began October with 100 units of merchandise inventory that cost $78 each. During October, the store made the following purchases: E: (Click the icon to view the purchases.) 25th Century uses the periodic inventory system, and the physical count at October 31 indicates that 130 units of merchandise inventory are on hand. Data Table Oct. 3 12 40 units @ $ 80 each 60 units @ $ 82 each 40 units @ $ 94 each 18 Print Done Requirement 1. Determine the ending merchandise inventory and cost of goods sold amounts for the October financial statements using the FIFO, LIFO, and weighted-average inventory costing methods. FIFO LIFO 11,080 Ending inventory Cost of goods sold 8,600