When purchase frequency or fees are uncertain, show a transparent range rather than a falsely precise monthly figure. Keep each assumption visible.
What to check
| Check | What to verify |
|---|---|
| Low case | Use documented lower-cost assumptions. |
| High case | Include plausible quoted fees or frequency. |
| Update | Replace assumptions with actual purchases. |
Use this checklist for your own comparison
Record product details, quotes or unanswered questions. Notes stay in this tab; download them before leaving.
Use documented lower-cost assumptions.
Include plausible quoted fees or frequency.
Replace assumptions with actual purchases.
A practical example
If delivery may be four or five times in a period, calculate both totals instead of guessing a single exact bill.
Before you decide
A range should reflect named uncertainties, not arbitrary padding.
For the broader task, see Compare food cost per day.
Reference and scope
FTC: online shopping provides background for this topic. Examples and checklists are original planning tools; no current seller prices or policies are asserted. The comparison prompts and examples above are practical planning aids, not reports of product testing.