[robzyb]

> wouldn't the margin (revenue-costs / revenue) already take into account the cost of acquiring customers?

Not necessarily. The word "margin" is very ambiguous because it could relate to many different types of margins.

In this case I think its safe to assume that "margin" meant the difference between the customer's price and the direct cost of supplying that particular unit of product, ignoring overheads.

[brey]

ah, yes, good point. if margin only includes cost of production, that's valid.