Surfer Boards is a small manufacturer of two types of popular low-tide surfboards: Graystone and Lava. The manufacturing process consists of two departments: fabrication and finishing. The fabrication department has 8 skilled workers, each of whom works 9.25 hours per day. The finishing departments has 5 workers, each of whom works a 6-hour shift per day. Each pair of Graystone surfboards requires 2.5 hours of labor in the fabrication department and 2 labor hours in finishing. The Laval model requires 4.2 hours in labor in fabrication and 3.6 hours in labor in finishing. Determine the number of units of each product to produce. For the purpose of this problem, only whole number units of surfboards could be made per day. You may not assume that the workers could return the next day to finish the job. You may assume that the profit for Graystone is $40/unit and Lava is $60/unit. What is the maximum profit could be achieved per day?