The number at the bottom of the receipt feels like the story. $187.42. You either shrug or panic. Either way, the total hides the plot.

Teardown: $164.10 on a normal Tuesday

Bank app says grocery store, $164.10. Useless. Open the middle of the receipt instead.

1. Coffee, name brand: $9.49. Habit line. Store-brand twin at $6.29 saves $3.20 next shop.
2. Paper towels, "value" six-pack: $12.99. Unit price loses to mid-size. Roughly $4.50 left on the table across sheets you will actually use.
3. Yogurt cups: looks cheap per cup, loses per ounce to the tub you bought two weeks ago. Size, not brand story.
4. Detergent: second bottle this week. Two shoppers, two lists. Duplicate, not demand.
5. Everything else: staples and noise. Birthday cake does not need a strategy. Milk and bread need history.

The total did not magically shrink overnight. The next total can, if you change the lines that wrote it.

Where money usually hides

• Pack size changes that keep the sticker flat while ounces drop
• Name-brand habits with a store-brand twin you already tried once
• Duplicate buys across household shoppers
• Store choice on a fixed basket: winning milk, losing produce
• Delivery and membership fees that never appear as a grocery SKU
• "Sale" packs with worse unit prices than the everyday mid-size

After the teardown

Sort by spending. Take two or three drivers only. Check swaps and unit prices on those. Leave the rest of the list alone for a week. Capture the next receipt so the teardown stays honest.

Totals are summaries. Summaries erase causes. Lines put the causes back in dollars you can edit.