00:01
Let's go over this question.
00:02
So this is a pure monopoly.
00:11
So with a pure monopoly and no price discrimination, so it has to charge the same price for everyone, it's going to produce where marginal revenue is equal to marginal cost.
00:29
That's the profit maximizing quantity.
00:33
So we're going to see where these two cross and it looks like that quantity is 25 units.
00:49
Then we need the price.
00:50
So the price is based off of the demand curve.
00:54
So at 25, we're going to draw a line up to the demand curve and then the price ends up being 65 at that quantity.
01:16
So the profits are given by total revenue minus total cost.
01:26
Total revenue is the price times the quantity.
01:32
Our marginal cost is constant and it's the cost of producing an additional unit.
01:37
So take the amount that will be produced multiplied by the marginal cost, which is 40.
01:43
That will give you the total cost...