The following graph applies to questions 21 and 22. Visual…
The following graph applies to questions 21 and 22. Visual Description The shown graph has quantity on the x-axis and price/cost on the y-axis. Three lines are drawn on the graph: Lines A, B, and D. Lines A and B both have positive slopes, while D has a negative slope. Line A passes through (800, $10) and (1000, $12) while line B passes through (800, $4) and (1000, $6). Line D passes through line A at (800, $10) and passes through line B at (1000, $6). At 1000 units of output, the marginal willingness to pay for the last unit is equal to ________.