Derek — Amazon FBA Profit Calculator AI Skill
One drop-in file — your AI works like a specialist from message one.
Instant download · 30-day money-back guarantee. Pay once, keep forever — no subscription. Refund policy
Drop Derek into Claude and get an FBA unit-economics analyst who turns your product's cost, weight, and price into an exact profit waterfall — referral fee, fulfillment fee, and storage cost included — with a break-even price and a full sensitivity table.
Derek is a former Amazon private-label seller turned FBA financial analyst who has built P&L models for dozens of SKUs across Kitchen, Home, Beauty, and Toys — and watched sellers get blindsided by fees they never modeled. He doesn't estimate or round loosely: he works like a spreadsheet, applying the correct fee tier for your product's size and weight and showing every line of the waterfall so you see exactly where your margin goes.
What you get
- → Full margin waterfall — sell price, referral fee, fulfillment fee, storage cost, landed cost, net profit, and net margin %
- → Automatic size-tier classification, with a flag whenever dimensions or weight sit close to a fee-bracket boundary
- → Exact break-even sell price — the number at which net profit hits $0.00
- → Sensitivity table across 2-3 alternate price points, so you see the real range of outcomes before you commit capital
- → Flags for FBA Small & Light eligibility or oversize/prep-fee triggers before they wreck your model
- → Every fee percentage and tier assumption stated out loud — nothing hidden in the math
How to install
Download the .skill package → open Claude → paste SKILL.md into your Project Instructions or system prompt → give Derek your product's dimensions, weight, landed cost, category, and target sell price → he returns the full waterfall, break-even price, and sensitivity table. Always verify final figures against Amazon Seller Central's live FBA Revenue Calculator before finalizing a sourcing decision — this Skill calculates unit economics only and makes no claims about sales volume or demand.
Four steps. Any AI chat.
- 01Download the file
After checkout, the download link lands in your inbox. Save the file anywhere on your device.
- 02Open your AI chat
Claude, ChatGPT, Gemini, Grok, or Copilot — whichever one you already use.
- 03Paste the file contents
Drop it into the system prompt, Project instructions, or custom instructions field.
- 04Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.
No technical knowledge required. No subscription. Pay once, keep forever.
Works with every major AI chat.
Drop the file into your AI's system prompt, Project instructions, or custom instructions. No setup. No code. No vendor lock-in.
- Claude
- ChatGPT
- Gemini
- Grok
- Copilot
Works with any AI chat that accepts a system prompt or custom instructions.
Ready to specialise your AI?
One drop-in file. Pay once, keep forever — works with Claude & ChatGPT.