Understanding the topic
A useful shopping list combines what you already have, what you need and how much you expect to use. Comparing unit prices can help, but larger packs are not automatically better if food will be wasted.
Quick reference
Use these reference points alongside the worked examples below.
| Term | Meaning / value | Why it matters |
|---|---|---|
| Inventory | What is already at home | Prevents duplicates |
| Meal plan | What you intend to prepare | Determines quantities |
| Unit price | Cost per kg, L or item | Helps compare packs |
| Budget | Amount available to spend | Supports choices |
| Shelf life | How long a product remains usable | Affects value |
Step-by-step method
- Check cupboards, fridge and freezer before shopping.
- Plan meals or tasks for the next few days.
- Write quantities, not just product names.
- Group items by store section to save time.
- Compare unit prices and only buy amounts you can use.
Worked examples
Example 1: Milk comparison
A 2 L bottle at $4.80 costs $2.40/L; a 1 L bottle at $2.70 costs $2.70/L.
Example 2: Bulk purchase
A 5 kg bag may cost less per kilogram, but only saves money if you use it before spoilage.
Example 3: Budget check
If five items cost $7, $9, $4, $6 and $8, the estimated total is $34.
Common mistakes and useful cautions
- A discounted product is not a saving if it was not needed.
- Check pack weight rather than relying on package size.
- Allow room for substitutions when an item is unavailable.
Practice questions
Try each question before revealing the answer.
Question 1: What is the unit price of 500 g at $3?
Answer: $6 per kilogram.
Question 2: Why check pantry stock first?
Answer: To avoid buying unnecessary duplicates.
Question 3: Is the biggest pack always best value?
Answer: No. Consider spoilage, storage and actual use.
What to remember
- Check cupboards, fridge and freezer before shopping.
- Compare unit prices and only buy amounts you can use.
- A discounted product is not a saving if it was not needed.