What is the marginal revenue gained when one more unit of output is sold? Question 7 options: The price of the unit of output sold The price of the unit of output sold minus the production cost of that unit The price at which the extra unit is sold but adds the rise in revenue of the previous units that could have been sold at a higher price The price at which the extra unit is sold but subtracts the drop in revenue of the previous units that could have been sold at a higher price