Discount Shopping Guide: Calculate Real Savings Every Time
Retailers invest billions annually in psychological pricing research designed to make consumers feel they're getting deals while maximizing profits.
Mathematical Deal Evaluation
Effective Discount Formula: (Original - Final) / Original × 100
Per-Unit Cost: Always calculate cost per unit when comparing package sizes
Per-Unit Cost: Always calculate cost per unit when comparing package sizes
Common Promotion Structures
- Stacked Discounts: Sequential discounts multiply, not add. 20% off then 15% off = 32% total savings
- BOGO: Buy one get one free = 50% off per item
- Cashback: 5% cashback is equivalent to 5% discount but delayed
Smart Shopping Rule: Never buy something solely because it's on sale. Calculate cost-per-use for true value assessment.