In 2008, Clay Bennett, the owner of the then Seattle Supersonics NBA basketball team (now the Oklahoma City Thunder), estimated that if the team remained in Seattle, he would suffer a loss of about $63 million over the following two seasons. If the team were allowed to move to Oklahoma City, he estimated that he would earn a profit of $19 million. What was the opportunity cost to Bennett of his team playing in Seattle rather than in Oklahoma City? Briefly explain.