Crystal Telecom has budgeted the sales of its innovative mobile phone over the next four months as follows: The company is now in the process of preparing a production budget for the third quarter. Past experience has shown that end-of-month finished goods inventories must equal 10% of the next month's sales. The inventory at the end of June was 3,000 units. Required: Prepare a production budget for the third quarter showing the number of units to be produced each month and for the quarter in total. (Do not round intermediate calculations.)