What does the writer mean by "incremental revenue" and "incremental cost"? Why would he focus on incremental revenue and incremental cost rather than on total revenue and total cost? "Incremental" means the same thing as A. "marginal." If the marginal revenue exceeds the marginal cost, the USPS's profit will increase. If the marginal cost exceeds the marginal revenue, the USPS's profit will decrease. B. "extra." Since this is an "all or nothing" decision, incremental revenue and incremental cost rather than total revenue and total cost must be examined. C. "marginal." If the marginal revenue exceeds the marginal cost, the USPS's profit will decrease. If the marginal cost exceeds the marginal revenue, the USPS's profit will increase. D. "additional." Since this is an "all or nothing" decision, incremental revenue and incremental cost rather than total revenue and total cost must be examined