Noel Enterprises has budgeted sales in units for the next five months as follows:

June 6,800 units

July 5,400 units

August 7,200 units

September 4,600 units

October 3,800 units

Past expereince has shown that the ending inventory for each month must be equal to 10% of the next month's sales in units. The inventory on May 31 contained 400 units. The company needs to prepare a production budget for the second quarter of the year.

The total number of units to be produced in July is:

A) 5,220 units

B) 6,120 units

C) 6,400 units

D) 5,580 units