A company that manufactures Slinkys has a fixed cost of $68,…

A company that manufactures Slinkys has a fixed cost of $68,000 per month that covers rent, utilities, and machine maintenance.  It costs the company $5 to produce a case of Slinkys which they sell to their distributors for $30 per case.  Determine a linear profit function , that represents the profit for the sale of cases of Slinkys.