Juanita and Sarah made 100 T-shirts with a picture for their school to celebrate a championship. They initially sold the T-shirts for $5 each. The T-shirts began selling quickly. Juanita and Sarah realized that $5 a shirt would not cover their costs, so they raised the price to $8 a shirt. As a result, sales declined and they had 20 unsold T-shirts at the end of the year.
Which term BEST describes what happened when Juanita and Sarah raised the price of the T-shirts?