Assess how price, competition, and advertising influence sales volume and profit in a student-run bake sale. Students will calculate revenue and profit from given price and quantity data (revenue = price × quantity; profit = revenue − costs), compare scenarios with varying competitor presence and advertising levels, interpret simple tables or bar charts, and justify strategy recommendations using evidence and trade-offs (e.g., lower price to increase demand vs. advertising cost to boost sales). Scope: grade 6–8 arithmetic, proportional reasoning, and short written analysis.