John is trying to decide how to divide his time between his job as a stocker in the local grocery store, which pays $7 per hour for as many hours as he chooses to work, and cleaning windows for the businesses downtown. He makes $2 for every window he cleans. John is indifferent between the two tasks, and the number of windows he can clean depends on how many hours he spends cleaning in a day, as shown in the table below:Hours PerDay CleaningWindowsTotal Numberof WindowsCleaned0017211314416517The first hour John spends cleaning windows costs him ________ that he could have earned in the grocery store.

A. $18
B. $14
C. $2
D. $7


Answer: D

Economics

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Economics