How did you participate in economics during the past week?

This week I participated in the economy through buying and selling. At the beginning of the week, I was trying to decide between a book and some new music, and I chose the book. I also worked at a coffee shop. These activities are part of economics because I was a consumer when I decided, based on opportunity cost, to buy something. When I worked, I was a producer. As both a producer and a consumer, I involved myself in the economy