4. A company produces two models of bicycles, model 201 and model 301. Model 201 requires 2 hours of assembly time and model 301 requires 3 hours of assembly time. The parts for model 201 cost $18 per bike and the parts for model 301 cost $27 per bike. If the company has a total of 34 hours of assembly time and $335 available per day for these two models, how many of each should be made in a day to use up all available time and money?