Shouldn't the answer to part A. be 110 - 11Q? Why would the Marginal Revenue not be impacted by the marginal cost of the last unit produced? Additionally, this function means that the equilibrium quantity (Q = 10) minimizes the Marginal Revenue function and thus maximizes total revenue, which would seem to me to be correct. What am I doing wrong by adding the marginal cost to the marginal revenue equations posted by others?