How do I factor in Facebook ad costs into my dropshipping pricing strategy?

Hello

i have not started any sales yet

I want to dropshipp from Oberlo to Sweden. I saw on internet that a good margin is around 20%.

Costs like customs, product costs, value added tax costs are known but how do i calculate marketing on facebook?

So if a product costs 10$, value added tax cost is 2$ in Sweden, custom is around 0.5 cent. So my product should cost around 12,5x0.2=15 to have a margin. But this will be wrong because i have not added facebook marketing costs. How should count facebook adds?

i wont spend more than 200-300 dollars per month to facebook adds in the begining.