2 types of trouser A and B are to be made by 2 people the cure and the sawyer the time needed to make both trousers are shown be low, cuter use 2 of time A and 1 time B, sawyer uses 1 for time A and 2 for time B , cuter may not use more than 140 hr and sawyer may not use less than 100hrs to finish the job the number of trouser of type A must exceed the number of type B by at least 10. If the cost of the pair of trouser of type A is 2000shs and the cost of pair of trouser of type B is 1500shs. Find the number of trousers of each type that can be made at minimum cost?