struggling with this

Topp Industries has budgeted sales in units for the next five months as follows: June July August September October 4,540 units 7,300 units 5,340 units 6,780 units 3,740 units Past experience has shown that the ending inventory for each month must be equal to 20% of the next month's sales in units. The inventory on May 31 contained 908 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