Asingle-price monopoly can sell 2 units for $8.50 per unit. in order to sell 3 units, the price must be $8.00 per unit. the marginal revenue from selling the third unit is

Marginal revenue is the ratio that is calculated in order to account for the change in overall income that results from selling one additional unit. This term is usually considered a microeconomic term but has many managerial accounting applications. 

The formula to be used is,
             Marginal revenue = (change in total revenues)/(change in quantity sold)

Revenue for 2 units sold:   R = (2 units)($8.50/unit) = $17
Revenue for 3 units sold:    R = (3 units)($8.00/unit) = $24
   
Change in Total Revenue = $24 - $17 = $7

Marginal Revenue = ($7) / (3 - 2) = $7/1

ANSWER: Marginal Revenue: $7/unit

E. all of the above