lata to answer the following question(s), using the Standard Solver. Stone Age Surfboards is a small manufacturer of two types of popular low-tide surfboards, the Graystone and the Lava models. 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 department has 5 workers, each of whom works a 6-hour shift per day. Each pair of Graystone surfboards requires 2.5 labor hours in the fabrication department and 2 labor hours in finishing. The Lava model requires 4.2 labor-hours in fabrication and 3.6 labor-hours in finishing. The company operates 6 days a week. It makes a per unit profit of $40 on the Graystone model and $60 on the Lava model. The company anticipates selling at least twice as many Lava models as Graystone models. Stone Age Surfboards B C D 1 2 3 Data 4 Department Fabrication Finishing Product Graystone Lava 2.5 4.2 2 3.6 Limitation (hours) 74 30 Profit Unit S40.00 $60.00 Model Graystone Lava 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Hours Used Quantity Produced Fabrication Finishing Excess Lava Market Mixture Total Profit Profit Contribution What is the Allowable Increase for Lava surfboards produced? O 18 12 0 30 24