Cost plus versus Retained margin
In creating price files you have a number pricing method options including "cost plus" and "retained margin".

We frequently get asked why these pricing methods can’t both be used within a pricing file.

The simple answer is that you can achieve exactly the same result using either of the pricing methods by using a different calculation:

The Gross Profit P is the difference between the cost of the product C and the selling price or revenue R.
P(£) = R(£) - C(£)

The Cost Plus percentage M (Mark up) is the profit P divided by the cost C to make the product i.e. the profit as a percentage of the product cost.
M(%) = P(£) / C(£)

The Retained Margin percentage G (Gross margin) is the profit P divided by the selling price or revenue R i.e. the profit as a percentage of the product sale price.
G(%) = P(£) / R(£)

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