Diamond Teleoom has budgeted the sales of its innovative smartphone over the next four months as follows: January 45,000 February 70,000 March 90,000 April 75,000 The company is now in the process of preparing a production budget for the first quarter. Past experience has shown that end-of-month finished goods inventories must equal 15% of the next month's sales. The inventory at the end of December was 6,750 units. Required: Prepare a production budget for the first quarter showing the number of units to be produced each month and the for the quarter in total