1 Inventory data for Mason Concrete Products for the year ended December 31, 2021, are as follows: Beginning inventory March 31 purchase Sales from January 1 to June 30 July 1 purchase 50 units at $150 each 50 units at $155 each 60 units 55 units at $160 each Sales from July 1 to December 31 70 units September 30 purchase Instructions 60 units at $170 each Compute the perpetual ending inventory balance on December 31, 2021, using FIFO