Wholesale, a percent you actually want, and the extras that land on the unit — packing, inbound freight, a payment cut. This is not a locked “Bizzit margin.” A catalog fill uses the same idea: your markupPct, your retail.
Retail = (wholesale + extras) × (1 + markup% / 100). If wholesale is $12.50, extras $1.75, and markup 40%, landed cost is $14.25 and retail is $19.95. Round how you like on the live site; this widget shows two decimals.
Bizzit Pro is $19/month for the hosted business and a custom domain — it is not a cut of these product prices. Visitor checkout, when you connect it, uses your payment account. Related: catalog fill, shipping calculator, pricing.