Write the formulation for this linear program. A company producing a standard line and a deluxe ...

Write the formulation for this linear program.
 
  A company producing a standard line and a deluxe line of dishwashers has the following time requirements (in minutes) in departments where either model can be processed.
 
   Standard Deluxe
  Stamping 3 6
  Motor installation 10 10
  Wiring 10 15
 
  The standard models contribute 20 each and the deluxe 30 each to profits. Because the company produces other items that share resources used to make the dishwashers, the stamping machine is available only 30 minutes per hour, on average. The motor installation production line has 60 minutes available each hour. There are two lines for wiring, so the time availability is 90 minutes per hour.
 
  Let x = number of standard dishwashers produced per hour
   y = number of deluxe dishwashers produced per hour