This number does not take ending inventory level into consideration. See the correct answer for a complete explanation. This result is based on an incorrect inventory formula, using the ending inventory as the beginning inventory and the beginning inventory as ending inventory. See the correct answer for a complete explanation. To solve these question we should use the formula for the physical flow of inventory: Beginning Inventory + Purchases ? Units Used in Production = Ending Inventory Since 1 unit of A-9 is required to produce one unit of finished goods, the number of units of A-9 needed for production will be the same as the number of units to be produced: 400,000. The number of units in beginning and ending inventory are given as 21,000 and 9,000, respectively. Therefore, the formula will be: 21,000 + Purchases ? 400,000 = 9,000 Solving for Purchases, we get Purchases = 388,000 units. This is the number of unit sales of finished product. See the correct answer for a complete explanation.
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