An opportunity cost, a sacrifice made after making a decision, is made everyday by any kind of person and in any kind of environment, this is a part of the effects of marginalism . For example, the AP biology students were supposed to do a two day termite lab, but due to delivery problems, our biology teacher had to stretch that time to 3 days. Our teacher made a decision that affected her students' learning schedule, which was decreasing our time to review, but increasing our knowledge on a particular subject. The marginal benefit of understanding the material was higher than the marginal cost the extra time needed to finish the lab. Another instance of this was while remodeling our house, my dad had to choose between Brazilian cherry oak and white oak flooring. He knew that if he chose the Brazilian cherry oak, the opportunity cost would be the extra money that he would have had to pay, but if he chose the white oak the opportunity cost would have been slightly less elegant appearance and quality of the flooring. When he made the final decision to choose the Brazilian cherry oak, the marginal benefit of the wood's great quality and appearance greatly exceeded the marginal cost of the extra money he had to pay in order to obtain the wood.
