Decide whether the idea deserves a test
See this course’s project requirements
A fictional resale feasibility file with an item screen, cost model, comparable sales, listing brief, return scenario and go-or-no-go decision.
Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.
What to include
- A resale-item screen with exclusions and verification needs.
- An item cost sheet including fees, shipping and time. A comparable-sale note with a justified test price.
- An unpublished condition listing and package-measurement brief.
- A return scenario showing contribution, loss and cash tied up.
- A resale feasibility decision supported by the full cost and return model.
Review and revise
Use these criteria to check your work and choose what to improve.
- Calculations reconcile to the supplied records, with units and dates labeled.
- Assumptions and missing information are visible, including the changed scenario.
- The recommendation follows the evidence and explains an important limitation.
- The six lesson outputs form a usable handoff that another learner can check.
Want more background?
The idea in everyday life
Use ten T1 attempts with nine retained and one returned: contribution before time $39.50. Every attempt takes 20 minutes valued at $12/hour. The fictional goal is at least $1 per attempt after this time allowance. No stock purchase, customer contact or live listing is required.
A useful business exercise may conclude that an idea should be revised or stopped. Show the decision threshold.
Decide whether the idea deserves a test — worked practice
A useful business exercise may conclude that an idea should be revised or stopped. Show the decision threshold.
Use ten T1 attempts with nine retained and one returned: contribution before time $39.50. Every attempt takes 20 minutes valued at $12/hour. The fictional goal is at least $1 per attempt after this time allowance. No stock purchase, customer contact or live listing is required.
1. Total time
Multiply 10 by 20 minutes and convert to hours.
You should see: 200 minutes, or 3 hours 20 minutes.
All attempts use time, including the return.
2. Value time
Multiply 200/60 by $12.
You should see: Time allowance totals $40.
Do not omit unsold or returned-item effort.
3. Compare result
Subtract time from $39.50.
You should see: Result is −$0.50, below the $10 group target.
The scenario fails the stated threshold.
4. Write decision
Recommend revising price/cost/time assumptions or stopping; attach all six records.
You should see: A complete resale feasibility file with an honest no-go result.
Completion depends on reasoning, not a profitable real sale.
What to finish
A resale feasibility decision supported by the full cost and return model.
Watch for this
Buying inventory merely to prove the course was completed.
How can I tell I understand it?
Explain your calculation or classification and reproduce the changed case without copying the worked result.
Quick knowledge check
Answer all 3 questions. Get at least 2 right and the lesson completes automatically.
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Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.
Go to the knowledge checkOptional course overview video · same video as Lesson 1
How to calculate Gross Profit (aka Gross Margin)
From Edspira. Watch here or open it on YouTube .
Optional course overview. Follow the written steps below at your own pace.Tools, templates, and lesson sources
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Sources and further reading
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Source & access notes · checked 2026-09-12
Inspected reseller screening guidance and scope, including recalled or unsafe products.
Access: Public page inspected without a sign-in; linked services may have separate requirements.
Reuse: Link to the original. Free reading does not imply permission to reproduce the page; lessons and fixtures here are original.
Source & access notes · checked 2026-09-12
Inspected package measurement, preparation and postage inputs; no current rate is copied.
Access: Public page inspected without a sign-in; linked services may have separate requirements.
Reuse: Link to the original. Free reading does not imply permission to reproduce the page; lessons and fixtures here are original.
Source & access notes · checked 2026-09-12
Inspected fee categories and bases. The exercise uses invented fees, not an eBay rate quote.
Access: Public page inspected without a sign-in; linked services may have separate requirements.
Reuse: Link to the original. Free reading does not imply permission to reproduce the page; lessons and fixtures here are original.
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