Hello I need help with this question

Walnut Orchard has two farms that grow wheat and corn. Because of differing soil conditions, there are differences in the yields and costs of growing crops on the two farms. The yields and costs are shown in the table below. Farm 1 Farm 2 Corn yield/acre (bushels) 500 650 Cost/acre of corn ($) 100 120 Wheat yield/acre (bushels) 400 350 Cost/acre of wheat ($) 90 80 Each farm has 100 acres available for cultivation. At least 11,000 bushels of wheat and 7,000 bushels of corn must be grown. Determine a planting plan that will minimize the cost of meeting these demands