In Figure 8.1, if the firm wants to sell the 101st unit of output, this last unit of output will: Figure 8.1 Graph-Downward sloping demand curve; there is a point above the middle of the demand curve with coordinates P1=10 and quantity 100 In Figure 8.1, if the firm wants to sell the 101st unit of output, this last unit of output will: add something to total revenue. take away something from total revenue. have a negative marginal revenue associated with it. be sold at a price of $10