Sizu 
Unit-Price Comparator
Price ÷ quantity for any items, side by side — the cheapest per unit highlighted.
What this book teaches
The everyday arithmetic of the till: how to compare two sizes on price-per-unit, see through a “20% off” that isn’t, work out whether a multi-buy actually wins, value a coupon or loyalty reward honestly, and add up the real total you pay. Plain math, done in seconds, that quietly stops you overpaying.
Free tools for this book
Discount & Final-Price
One discount or several stacked — and why 20% then 10% is 28% off, not 30%.
Multi-Buy Break-Even
“3 for $5” vs singles — the true price per item, and what you’ll actually use.
Cost Per Use
Price ÷ uses — when the dearer thing that lasts is the cheaper one.
Smart Shopping Toolkit
All nine shopping tools, gathered and sized to print. No sign-up.
All chapters
- 1Unit Price — Comparing Any Two Sizes
- 2Percent Off — What’s the Real Price?
- 3Stacked & Multi-Buy Deals — When the Offer Actually Wins
- 4Coupons, Points & Cashback — What a “Reward” Is Really Worth
- 5Membership & Subscription Break-Even — Worth It, or a Slow Leak?
- 6The Real Total at the Till — What You Actually Pay
- 7Putting It Together — The 10-Second Shopper
- ★Bonus — Cost Per Use: What Things Really Cost You
- ★Bonus — Buy Now, Pay Later: What It Really Costs