Category: Money Matters

Compare simple and compound interest using matching rates, principal and time periods. Worked examples, a balance table and diagrams explain compounding frequency, monthly contributions and the conditions that affect what you actually receive.

Opportunity cost focuses on the next-best alternative, rather than the sum of everything you could do. Explore worked examples, explicit and implicit costs, and the difference between opportunity costs and sunk costs to compare everyday choices.

Past spending can make it hard to decide whether to continue or stop. Learn how sunk costs differ from recoverable costs, recognize the sunk cost fallacy, and compare your options using practical examples and a step-by-step process.