Past experience has shown that the ending inventory for each month should be equal to 10% of the next month's sales in units. The inventory on May 31 fell short of this goal since it contained only 400 units. The company needs to prepare a Production Budget for the next five months. The total number of units to be produced in July is:

A) 7,740 units B) 7,200 units C) 7,020 units D) 7,280 units