Lewis Hats is planning to sell 600 straw hats in April. Each hat requires kilogram of straw and hour of direct labour. Straw costs $0.20 per kilogram and employees of the company are paid $22 per hour. Lewis has 80 kilograms of straw and 30 hats in beginning inventory and wants to have 50 kilograms of straw and 60 hats in ending inventory. How many kilograms of straw should Lewis Hats buy in April? Please show your work .The correct answer is 270.