The following data are available for Sellco for the fiscal year ended on January 31, 2011:

Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            1,600 units

Beginning inventory . . . . . . . . . . . . . . . . . . . .           500 units @ $4

Purchases, in chronological order . . . . . . . . . .           600 units @ $5

                                                                                        800 units @ $6

                                                                                        400 units @ $8

Required:

a. Calculate cost of goods sold and ending inventory under the following cost-flow assumptions (using a periodic inventory system):

1. FIFO.

2. LIFO.

3. Weighted average. Round the unit cost answer to two decimal places and ending inventory to the nearest $10.

b. Assume that net income using the weighted-average cost-flow assumption is $58,000. Calculate net income under FIFO and LIFO.