Amazon United States · EN / ES

Wholesale and retail arbitrage resources

FBA/FBM tools, worksheets, supplier catalog analysis and the iPhone retail arbitrage app. English and Spanish resources for Amazon US sellers.

Check a decision

UPC & EAN check digit calculator

Paste a barcode: it tells you whether the last digit checks out, completes it if it is missing, and spots the leading zero your spreadsheet ate.

Amazon FBA & FBM revenue calculator

Compare FBA and FBM profit, ROI, margin, break-even and maximum unit cost using your own shipping quote. Starting values are examples; replace them before making a purchase.

The seven Amazon restriction types

Seven kinds of gate and three ways they open. Which gates exist, anyone can explain; which one applies to you, only your connected account knows.

Worksheets without sign-up

Each Excel workbook has EN and ES tabs with formulas. Replace the sample inputs and review zero costs: those are assumptions too. Import CSV barcodes as text to preserve them.

Supplier list evaluation

Record packs, case prices, unit cost, source, requirements and the decision for each row.

Excel · EN + ES CSV · EN

FBA unit costs

Enter purchase, prep, fees, inbound, storage, returns and other costs; calculate profit, ROI and margin.

Excel · EN + ES CSV · EN

Wholesale analyzer trial

Ten cases for matches, packs, eligibility, corrections, exports and timing. Fill the worksheet using your catalog and repeat the sample in each tool. Results are blank.

CSV · EN How to compare the tools

Retail arbitrage in store

Scan products with your iPhone, compare FBA/FBM profit and organize the items you review by store visit. Check requirements, shared limits and the link to the published app.

How the iPhone retail arbitrage app works

A catalog you can audit

Sunrise Wholesale

Public synthetic sample: 335 extracted rows, 296 accepted and 39 quarantined. Names and barcodes are invented. It does not represent actual Amazon sales, eligibility or results.

View PDF and extraction CSV input

Reproducible review

An assumed $5 cap, availability and extraction status leave 120 rows for manual review. This is not a buying shortlist. The summary explains the rules and limitations.

CSV results JSON method Python 3

How to reproduce it on your computer

Download the input CSV and reproduce.py into one folder. With Python 3, run this command. It needs no dependencies, sign-up or Amazon connection.

python3 reproduce.py --input sunrise-wholesale-extracted.csv --output review-results

Change --max-unit-cost to test another assumption and keep the original results separately.