Samantha has just developed a new tile installation technology for installing a one of a kind glass tile into homes in Saskatchewan. In addition to the high upfront investment cost, her patent application for this new technology was recently approved resulting in significant barriers to entry for other firms. No other firm has access to this technology. Samantha is trying to decide what price she should charge her customers. 

What is Samantha's total profit?

Based on the graph above, what price should Samantha charge based on the profit maximising level of output?

In the above graph, the marginal revenue curve is twice as steep as the demand curve. Based on this information, we can conclude:

Samantha's brother has a company that sells Tractors in Winnipeg. Her brother recently told her that there are high barriers to entry, and he typically chooses output and prices based on the decisions of other tractor companies in Winnipeg. He is trying to decide if he should collaborate with other tractor companies or individually compete to gain more profits. This industry can be characterized as:

Based on the graph above, what is the profit maximizing level of output?