X-Print Manufacturing makes laser printers. One plant assembles the PL-4000 model. Standards indicate that one worker can assemble five printers per day. This model costs about $350 to make, and the company figures it costs $5 to hold one printer in inventory for one month. Workers earn $1500 per month and can be hired for $500 each; firing a worker costs $750. Currently, there are 12 workers in the assembly department. If a printer is backordered, the cost is $35 per unit per month.Develop a mixed plan for this problem by allowing backorders and workforce can be changed only at the beginning of July (first month of the plan) and at the beginning of October.