Purchases of a certain product during March are set out below: Units sold during the month were as follows: March 10, 80 units; March 14, 100 units; March 30, 90 units. There were no opening...

Purchases of a certain product during March are set out below:

Units sold during the month were as follows: March 10, 80 units; March 14, 100 units; March 30, 90 units. There were no opening inventories.

      You are required to determine the cost of goods sold for March under three different valuation methods: FIFO, LIFO, and Weighted average cost.