During the month, Reckem Inc. produces a single product, Kolapze, en mass in a continuous production process and uses a weighted-average process-costing method. During the period the company starts production of 15,000 new units, completing the production to 60%.

If the company starts the month with 3,500 units in beginning work in process inventory, how many equivalent units would be used to allocate conversion costs to work in process ending inventory?