You are the manager of the unique supermarket of the town. A local company wants you to sell its milk. But you have already many other milk in you supermarket.
You estimate that you would be able to sell 500L/day of this milk at p = 2. You know that the marginal cost of the local company is 0.5$/L but the manager propose the milk at 1$/L (and will never accept to sell it for less).
What will be your profit if you accept the deal?