A limitation of 1,510 machine-hours per week prevents Golden Leaf Manufacturing Company from meeting the sales demands for its products. The product information is as follows: R1 R2 R3 R4 Unit selling price $450 $300 $175 $300 Unit variable cost-300 -125 -100 -150 $150 Unit contribution $150 $175 $75 margin Machine-hours 10 10 10 15 per unit Assuming demand for each product is as follows: R1 50 units; R2 80 units; R3 15 units; and R4 10 units, what is the best short-run profit maximizing strategy