Having a hard time understanding the FICO and LIFO method. Any explanations would be greatly appreciated. Please help to solve and explain b2. Thank you!

Problem 6-02A a, b1-b2, c (Part Level Submission) (Video) Vaughn Distribution markets CDs of the performing artist Unique. At the beginning of October, Vaughn had in beginning inventory 2,000 of Unique's CDs with a unit cost of $5. During October, Vaughn made the following purchases of Unique's CDs. Oct. 3 2,500 @ $6 Oct. 19 3,000 @ $8 Oct. 9 3,500 @ $7 Oct. 25 4,000 @ $9 During October, 10,850 units were sold. Vaughn uses a periodic inventory system. (a) Your answer is co Collapse question part Determine the cost of goods available for sale. Cost of goods available for sale 109500 Click if you would like to Show Work for this question: Open Show Work SHOW SOLUTION SHOW ANSWER LINK TO TEXT Attempts: 1 of 5 used (b1) Your answer is correct. Calculate cost per unit. (Round answer to 2 decimal places, e.g. 2.25.) Cost per unit 7.3 Click if you would like to Show Work for this question: Open Show Work SHOW SOLUTION SHOW ANSWER LINK TO TEXT Attempts: 3 of 5 used (b2) Determine (1) the ending inventory and (2) the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). (Round answers to 0 decimal places, e.g. 1,250.) FIFO LIFO AVERAGE-COST The ending inventory $ $ $ The cost of goods sold $ Click if you would like to Show Work for this question: Open Show Work