Raveen Products sells camping equipment. One of the companys products, a camp lantern, sells for $90 per unit. Variable expenses are $63 per lantern, and fixed expenses associated with the lantern total $135,000 per month. At present, the company is selling 8,000 lanterns per month. The sales manager is convinced that a 10% reduction in the selling price will result in a 25% increase in the number of lanterns sold each month. If proposed changes by sales manager implementted, then How many lanterns would have to be sold at the new selling price to yield a minimum net operating income of $72,000 per month?