Opportunity Cost

Yesterday my sisters and I went to Starbucks, where I had to choose between getting a smoothie or a coffee drink. If I chose the smoothie, I would be choosing the healthier drink. Also, it wouldn't keep me up all night like coffee would. If I chose the coffee drink, I could get my favorite flavor, vanilla, put into it. I had decided earlier that day that I was going to try to go to bed early. So in the end, I chose the smoothie because it was healthier and it wouldn't keep me up all night.