Linear programming exercises!

Exercise I A transport company has two types of trucks, Type A and Type B. Type A has a refrigerated capacity of 20m and a nonrefrigerated capacity of40m3 while Type B has the same overall volume with equal sections for refrigerated and non-refrigerated stock. A grocer needs to hire trucks for the transport of 3, 0001713 of refrigerated stock and 4,0001% of non-refrigerated stock. The cost per kilometer of a Type A is $30, and $40 for Type B. How many trucks of each type should the grocer rent to achieve the minimum total cost? Exercise 2 A school is preparing a trip for 400 students. The company who is providing the transportation has 10 buses of 50 seats each and 8 buses of 40 seats, but only has 9 drivers available. The rental cost for a large bus is $800 and $600 for the small bus. Calculate how many buses of each type should be used for the trip for the least possible cost.Exercise 3 A store wants to liquidate 200 of its shirts and i012] pairs of pants from last season. They have decided to put together two offers. A and B. Offer A is a package of one shirt and a pair of pants which will sell for $36. Offer Bis a package ofthree shirts and a pair of pants, which will sell for $50. The store does not want to sell less than 2U packages of Offer A and less than 10 of Offer B. How many packages of each do they have to sell to maximize the money generated from the promotion