Discounts & product refunds
Separate reductions in product revenue. A refund alone does not automatically reverse product cost or payment fees.
CONTRIBUTION MARGIN FOR SHOPIFY
When margin moves,
see what moved it.
MarginBinder — contribution margin diagnostics
A local prototype for calculating Shopify order contribution margins and highlighting changes, with missing costs shown as unknown.
Every amount has a source.
Every missing cost stays visible.
A FICTIONAL ORDER
Follow the margin.
TAX EXCLUDED
Static illustration · all costs shown are fictional
- Product sales
- €100.00
- Discounts
- -€10.00
- Product refunds
- -€20.00
- Net product revenue
- €70.00
- Product cost
- -€40.00
- Payment fees
- -€3.00
- Merchant shipping
- -€8.00
Measured contribution€19.00
27.14% margin€70.00 net product revenue − €51.00 included costs.
Fictional order amounts, not product prices. If payment fees are unavailable, contribution and margin are unknown; €22.00 is only an incomplete known-terms subtotal. Contribution is not net profit, verified accounting or demonstrated savings.
A CLEARER COST PICTURE
Start with what the
numbers actually include.
Bring the components into view before drawing a conclusion from the margin.
Product cost
Use the cost basis available for the order. Restock credit belongs in the calculation only when it is verified.
Shipping & payment fees
Merchant shipping expense is different from shipping charged to the customer. Fee availability depends on the source; missing is not zero.
Outside this contribution measure Tax, advertising, overhead and income tax. No ad attribution or claim of a complete profit-and-loss statement.
CHANGES WITH CONTEXT
A change deserves
an explanation, not a guess.
The prototype compares a current period with a reference period, using coverage checks before showing measured changes.
Product cost, discounts, refunds and the available fees can help explain what changed. An observed movement does not prove a cause, fraud or a saving.
Read the coverage limits ↑BUILT CAREFULLY. STILL IN PREPARATION.
Ten conversations before a pilot.
Do you run a Shopify store? We are talking to 10 owners or operators, 20 minutes each, about how you check order margins today and whether a weekly margin alert would be worth paying for.
We can show a fictional example. Do not send order exports, customer details, credentials, admin screenshots or invoices. No installation or store access is requested.
Before writing, read the discovery privacy notice below. There is no paid offer or automatic subscription.
Write to contact@ppftec.com