Norman’s Televisions produces television sets in three categories: portable, midsize, and flat-screen. On January 1, 2014, Norman adopted dollar-value LIFO and decided to use a single inventory pool. The company’s January 1 inventory consists of:

                      

During 2014, the company had the following purchases and sales.

                      

Instructions
  (a) Compute ending inventory, cost of goods sold, and gross profit.
  (b) Assume the company uses three inventory pools instead of one. Repeat instruction (a).