Hello Sausage! Do you mean how much you would charge for a facial treatment? If you do, you need to think of ALL of your outgoings e.g rent, bills, wages etc. divide them down to how much it costs you per 15 mins. Work out how many treatments you will get out of each product, and work out the cost of product per treatment. Then you work out how long it takes to do the treatment e.g 1 hour. Add your outgoings to your product use and add the profit you would like to make. Hope that helps xx