I think the thing is it just depends so massively on the market and product within the market.
Margin also depends on producer or seller. Producer margins include cost of production (raw materials, energy and employee costs). Would not include fixed capital costs, marketing, non-production employee costs, etc.
A retailer is just their purchase cost be sales prices. It still depends on the retail market and product. Higher end products usually aren’t very high margin. Auto dealerships generally run 8-13% margin.
Higher end electronics are typically in the 15-30% range.
Liquor store runs 40-50% margins.
Of course once you get outside direct retail it can vary wildly. Especially when you are talking producers.
A restaurant might run 30% margins (not gross) on a meal. The beverage might be 80%
