Bob's Bobcats can make two models of bobcats - the Bill and the Buck. Each Bill sells for $7,500, has $5,000 in variable costs and takes 100 hours to make. Each Buck sells for $14,000, has $9,500 in variable costs, and takes 300 hours to make. Bob's Bobcats can sell all of either unit they can produce. There are only 30,000 labor hours available this month. What model should be produced and how many can be produced to maximize profit?