A shipping company owns two types of trucks, type A and type B. Each type A truck has 20m3 of refrigerated space and 30m3 of unrefrigerated space, while each type B truck has 20m3 of cooled space and 10m3 of unrefrigerated space. One of the merchants wanted to ship a quantity of the goods for a certain distance, and his goods required 160 m3 of cooled space and 120 m3 of uncooled space, and if the company knows that each type A truck consumes 300 gallons of fuel to cover the distance, while each type B truck consumes 200 gallons of fuel to travel the same distance Required //. Create a linear programming model if the company's goal is to obtain the least amount of fuel consumed