The company is able to build at most 750 washing machines per month and at most 600 dishwashers per month. It takes 20 hours of labor to build a washing machine and 25 hours of labor to build a dishwasher. The company has at most 20,000 hours of labor available each month. If x is the number of washing machines and y is the number of dishwashers built per month, draw in lines to represent the boundaries of the region that contains all of the possible combinations of washers and dryers that can be built in one month.