Originally posted by Fleetwood
Ooops, I should have added "expressed as a percentage of total sales" onto that definition.... (my thanks to Wikipedia for confirming that I wasn't totally losing my marbles)
However, the margin in your example is not 14.29%
Mark-up is £50 on £300 = 16.66%
Margin is 1 - (total costs (£300 plus the agent's own cost of business, say £30/day) / total revenue (£350)) = 5.7%
My point being that ... since you don't know what the agent's cost of business is, you can't calculate what the actual margin is. Could be any number lower than 14.29%, including a loss.
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