AgK rents out computing services to agricultural producers. They charge a xed rental payment for the right to unlimited computing at a rate of P USD per minute. There are two types of potential users: 100 farmers and 100 ranchers. Each farmer demand is given by Qf = 60 - Pf, and each rancher's demand is given by Qr = 40- Pr, where Q is in 1000 minutes per month and P is in USD per minutes. The marginal cost is 10 USD per minute. Suppose that you could separate farmers and ranchers. For ranchers. the optimal usage fee is: 0 50.000 010 Go 02o