Answer:
Production = 27600 units
Step-by-step explanation:
The number of units that must be produced during the month should be enough to meet the selling requirement for the month plus the desired level of ending inventory. Any starting of beginning inventory at the start of the month will reduce the number of units to be produced. Thus, the formula to calculate production for the month is,
Sales = Opening inventory + Production - Closing Inventory
Total sales = 7000 + 8000 + 9000 = 24000
24000 = 18000 + Production - 21600
24000 + 21600 - 18000 = Production
Production = 27600 units