• A firm consists of 600 acres of land, of which 500 acres will be planted with corn, soybeans and wheat according to these condition: -At least half of the planted acreage should be in corn - no more than 200 acres should be soybeans -the ratio of corn to wheat planted should be 2:1 It costs birr 20 an acre to plant corn, 15 an acre to plant soybeans and birr 12 an acre to plant wheat. Formulate this problem as LP model that will minimize planting cost.