The cheapest item is the one you skip
Duplicates of things already at home cost full price.
All tracks and lessons
A grocery list that works for your household
Compare useful alternatives, check what is already at home, and edit before you shop.
In this lesson you will
- Check what is already at home before shopping
- Choose sizes that match what you use
- Compare the same amount, not the same price
Your best grocery list starts with what your household will use. A cheaper item is only useful when the size, ingredients and purpose fit your needs.
Compare the same amount
For example, a 12-ounce pack at $6 costs $0.50 per ounce. A 10-ounce pack at $5.50 costs $0.55 per ounce. The smaller pack has the lower checkout price, while the larger pack has the lower unit price. These are illustrations, not current offers. Buying more is not a saving if the extra food goes unused.
Compare price per ounce
12 ounces for $6$0.50/oz
10 ounces for $5.50$0.55/oz
Choose the option that fits
- Keep your usual item when its ingredients or quality matter to you.
- Try a comparable brand after checking pack size and dietary needs.
- Buy a smaller quantity when that reduces waste.
- Skip a duplicate when there is enough at home.
Review before leaving
Check quantities, pantry stock, current shelf prices and any delivery or membership costs. An earlier receipt or online listing is a reference, not a promise of today’s price or local stock. A single lower price may not justify an extra trip.
Make repeats easier
Keep useful staples on an editable list. Adjust the next quantity to what you actually used. Record the receipt after shopping so the next comparison starts with a real purchase instead of a guessed saving.
Further reading: USDA MyPlate, Healthy Eating on a Budget, explains meal planning, shopping lists and unit-price comparisons.
Also published as an article: A grocery list that works for your household. By the GetGuac team · Editorial policy
Three ideas to keep
Waste is a price increase
Half a pack thrown away doubles its real cost.
Last receipt is a reference
Today’s shelf price may differ.
Do it in 4 steps
Check pantry and fridge
Cross off what is already there.
Match quantity to use
Buy what last week actually used.
Compare per unit
Same amount, same quality.
Record the receipt
So the next list starts from a real price.
A five-minute list review
Illustrative prices for one weekly list.
| Item | Before review | After review | Difference |
|---|---|---|---|
| Olive oil (one already at home) | $8.99 | $0 | $8.99 |
| Spinach 10 oz to 5 oz (half usually wasted) | $3.99 | $2.49 | $1.50 |
| Yogurt 4-packs, two to one (one expired last time) | $5.98 | $2.99 | $2.99 |
| Total | $13.48 |
Nothing was given up — only duplicates and waste were removed.
Where this usually goes wrong
- Shopping without checking stock
- Buying the big pack that never gets finished
- Swapping to an item that does not suit dietary needs
Before your next shop, check every list item against what is already at home.
Tools and guides for this lesson
Quick quiz
1. What is the cheapest item on your list?
2. Half a pack is usually thrown away. What does that do to its real cost?
3. An old receipt price is…
0 of 3 answered
Puzzle
A 12 oz pack costs $6.00 and a 10 oz pack $5.50. Which is cheaper per ounce?
Show the answer
The 12 oz pack ($0.50 vs $0.55)
$6.00 ÷ 12 = $0.50. $5.50 ÷ 10 = $0.55.