Milken Inc. produces multi-colored lens for the astrological telescope industry. The planned production budget for the next few months is: July 5,800 lens, August 7,000, September 7,700, October 8,600. Each lens requires 2.2 hours of grinding labor (paid $17 per hour) and 2.4 hours of polishing labor (paid $18 per hour). How many total labor hours will be budgeted for September? 7.700 16,940 18,480 35 420