Maria can purchase shirts for ​$22.00 each. She considers the benefit of one shirt to be ​$40.00​, but with each additional shirt she purchases the benefit decreases by $5. According to the Principle of Optimization at the​ Margin, Maria will purchase... shirts. ​(Enter your response as a whole number​.)

Microeconomics
13th Edition
ISBN:9781337617406
Author:Roger A. Arnold
Publisher:Roger A. Arnold
Chapter7: Consumer Choice: Maximizing Utility And Behavioral Economics
Section: Chapter Questions
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Maria can purchase shirts for ​$22.00 each. She considers the benefit of one shirt to be ​$40.00​, but with each additional shirt she purchases the benefit decreases by $5.

According to the Principle of Optimization at the​ Margin, Maria will purchase... shirts.

​(Enter your response as a whole number​.)
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