I am working on a practice exam and I am unsure how to go about this

Illinois State University : ECO 1( X G how to find marginal cost - Goc x C reggienet.illinoisstate.edu/portal/site/a9775572-ec12-4e46-a208-82625caabd11/tool/ecc5f15c-8c24-40c4-a295-f2dfaa15d146/jsf/index/mainindex To A B IlinoisState.edu Gi Giving News Events Map Apply Search/A-Z My Reggienet BT B. False Answer Key:False Question 39 of 50 1.0 Points A monopolist can sell 300 units of output for $50 per unit. Alternatively, it can sell 301 units of output for $49.60 per unit. The marginal revenue of the 3015 unit of output is A. -$99.60. O B. -$70.40. x O C. -$0.40. O D. $70.40. Answer Key:B Question 40 of 50 1.0 Points Table 15-3 Tommy's Tie Company, a monopolist, has the following cost and revenue information. Assume that Tommy's is able to engage in perfect price discrimination. Costs Revenues Quantity Total Marginal Quantity Price Total Marginal Produced Cost Cost Demanded Revenue Revenue (Dollars per