Determining the Marginal Cost of Output (Or Different Activity Levels)

Determining the marginal cost of output (or different activity levels) requires dividing

A) % total output by the % funding at that activity level
B) % total output at that activity level by the % change in funding from the previous activity level
C) % change in total output from the previous activity level by the % funding at that activity level
D) % change in total output from the previous activity level by the % change in funding from the previous activity level