Macroeconomics 20th Edition by Campbell McConnell,Stanley Brue,Sean Flynn

Exercise 33

For each of the following situations involving marginal cost (MC) and marginal benefit (MB), indicate whether it would be best to produce more, fewer, or the current number of units.
A) 3,000 units at which MC = $10 and MB = $13.
B) 11 units at which MC = $4 and MB = $3.
C) 43,277 units at which MC = $99 and MB = $99.
D) 82 units at which MC MB.
E) 5 units at which MB MC.