9.3 Short-Run Decisions Assume the Following Total Cost Schedule for a Perfectly Competitive

9.3 Short-Run Decisions
Assume the following total cost schedule for a perfectly competitive firm.
TABLE 9-2
-Refer to Table 9-2.What is the marginal cost of producing the 2nd unit of output?

A) $10
B) $15
C) $5
D) $30
E) $35