If a consumer derives a marginal benefit of $20 from a good priced at $5, what is the marginal benefit per dollar spent?

To find the marginal benefit per dollar spent, you divide the marginal benefit by the price of the good. In this case, the consumer gets a marginal benefit of $20 from the good, which costs $5. So, you calculate $20 divided by $5, which equals 4. This means the consumer receives a marginal benefit of 4 dollars for every dollar spent. For example, if someone spends $5 on a snack and feels it gives them satisfaction worth $20, they are getting a good deal because they enjoy it four times more than what they paid.