Final answer:
The ending balance in inventory on May 31 using the FIFO method is 164 units.
Step-by-step explanation:
In order to calculate the ending balance in inventory using the first-in, first-out (FIFO) method, we need to keep track of the order in which the units were purchased.
Based on the transactions given:
- Starting inventory: 306 units
- On May 5, 132 units were sold, leaving a balance of 306 - 132 = 174 units remaining
- On May 10, 150 units were purchased at $6 each. This means the cost of these units is 150 * 6 = $900. This brings the total units to 174 + 150 = 324 units
- On May 27, 160 units were sold, leaving a balance of 324 - 160 = 164 units remaining
Therefore, the ending balance in inventory on May 31 using the FIFO method is 164 units.