Omari's HookNLadder is the only company selling fire engines in the fictional country of Alexandrina. Omari initially produced eight trucks, but then decided to increase production to nine trucks. The following graph gives the demand curve faced by Omari's HookNLadder. As the graph shows, in order to sell the additional fire truck, Omari must lower the price from $80,000 to $60,000 per truck. Notice that Omari gains revenue from the sale of the additional engine, but at the same time, he loses revenue from the initial eight engines because they are all sold at the lower price