<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Marginal_utility" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Marginal_utility</a><p>At $1 the second dollar is useful, at $50,000, I&#x27;m good for the year and will not pursue additional dollars. Replace $50,000 with whatever amount you need to feel content.