Money and shopping
Best buy within a budget 8Bulk discounts and tiered pricing 1🔒Coin combinations 6🔒Exchange rates with made-up units 6🔒Fares and per-mile costs 10🔒Fees and break-even counts 5🔒Hourly pay 18🔒Income and savings 3🔒Linear cost models 16🔒Money spent and left 17🔒Prices from two purchases 18🔒Purchases with several unknowns 16🔒Revenue from stock 6🔒Sales tax and tips 18🔒Simple purchases 5🔒Stamps and postage 4🔒Ticket sales and admissions 11🔒Unit cost of food and drink 8🔒Unit prices of pens and pencils 8🔒