(Answered) To maximize economic surplus, keep increasing output as long as:To maximize economic surplus, keep…

➤ Why does equality of marginal benefit and marginal cost maximize surplus?
At MB = MC the last unit’s value to buyers equals its opportunity cost to society, so no net gain remains from changing output. If MB > MC you raise output to capture extra surplus. If MB < MC you cut output to avoid wasting resources. That equality yields allocative efficiency.