My whole line of reasoning makes perfect sense given I worked in trades doing exactly what I talk about in a country with one of the most complicated tax systems there is. Prices are calculated by adding your costs into the base price which is common sense. If you do that you can actually calculate the amount of coffees you need to sell to turn a profit and if the business even makes sense in the first place.

Every unit of coffee you sell should turn a profit. Which in turn should be taxed. Even cigarettes that probably only turn micro cents profit should be taxed by per unit sold. They even are, given their sales are heavily regulated.

No company is giving out "free" products without making a profit just to go even on their initial investment.