A farmer plans to plant two crops, A and B. The cost of cultivating crop AA is $40/ acre, whereas the cost of cultivating crop B is $60/ acre. The farmer has a maximum of $9000 available for land cultivation. Each acre of crop A requires 10 labour - hours and each acre of crop B requires 25 labor-hours. The farmer has a maximum of 3500 labor-hours avaibble If she expects to make a profit of \$150/acre on crobA and $200 lacre on crop B, how many acres of each crop should she plant to maximize her profit