Williams Inc. makes multi-colored lens for the astrological telescope industry. The Company plans to produce the following for the next few months: July 5,700 lens, August 7,200 lens, September 8,300 lens, October 8,200 lens. Each lens requires 0.6 square meters of crystal. Williams Inc.'s goal is to maintain crystal ending inventory at 25% of next month's production needs. On July 1 lens inventory was expected to be 855 square meters. What will lens purchases be for July?