This learning resource focuses on the concept of opportunity cost and total economic cost. It begins with a clear objective for students to understand how to calculate economic costs by combining the money price with the value of the next best alternative sacrificed. The activities include a brainstorming session on the differences between money price and opportunity cost, guided calculations of total economic cost through real-life scenarios such as choosing between attending a movie or working, and logical justifications for only considering the next best alternative as the opportunity cost. Additionally, there are opportunities for personal trade-off reflections, concert scenario analyses, and discussions on situations where money price and opportunity cost vary significantly. The resource culminates in a metacognitive reflection on confidence in calculating total economic costs, ensuring a comprehensive understanding of the topic.