2. Cohen Chemicals, Inc., produces two types of photo-developing fluids. The first, a blackand-white picture chemical, costs Cohen $2,310 per ton to produce. The second, a color photo chemical, costs $3,000 per ton. Based on an analysis of current inventory levels and outstanding orders, Cohen's production manager has specied that at least 30 tons of the blackandwhite chemical and at least 20 tons of the color chemical must he produced during the next month. in addition, the manager notes that an existing inventory of a highly perishable raw material needed in both chemicals must be used within SD days. In order to avoid wasting the expensive rayllr material, Cohen must produce a total of at least 6C! tons of the photo chemicals in the next mo nth. {1] Formulate a linear programming model that will help Cohen determine its production schedule so as to minimize the total cost