Encourage deeper thinking about spending, pricing, and advertising tactics. 📌 Topics Included: • Multi step shopping calculations multi step shopping • Cost based on partial use partial use cost • Difference between two prices as percent price percentage difference • Unit price with leftovers unit price with leftovers • Estimating percent error in pricing percentage error estimation • Spending as a percentage of budget percentage of budget • Buy now vs wait for better sale buy now vs wait • Bud