Cost of Supplies + €10 per Hour Time Spent = Price A.
Cost of Supplies x 3 = Price B.
Price A + Price B divided by 2 (to get the average between these two prices) = Price C.
Compare Price C to your Market Research and adjust accordingly.
E.g. It takes 2 hours to dye €20 worth of fabric
€20 Fabric + €20 Time = €40 (Price A)
€20 fabric x 3 = €60 Price B (€40 + €60) = €100.
Divided by 2 = €50 (Price C)
€50 should be in the range of the fair market price for my item. If €50 is too high, you’re either spending too much on supplies or working slower than other crafters.
If €50 is too low, work faster than other crafters, or try to get a better deal on supplies and raise your price a bit to have a fair market price and support the other artisans in your field.
Theses figures are for example only and to illustrate the formula 
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