Formula A: You can ask: “If I price it $10 and the gallery sells it for $10, how much will I get?”
Let's say the gallery is going to take 15% commission for the sale of your item. (you take 100% or 1.00, minus the 15% or .15 paid to the gallery, leaves 85% or .85 which will be paid to you)
Price of item multiplied by .85 [Sample: $10.00 X .85 = $8.50. You would receive $8.50 and TRWC would receive $1.50]
OR
Formula B: You can ask, “If I want to be paid $10, how much must I sell it for?”
Price of item divided by .85 [Sample: $10.00 divided by .85 = $11.76. You would receive $10.00 and TRWC would receive $1.76. So you need to price your item $11.76]
These formulas work for any percentage you would be paying any gallery, just plug in the percentage the gallery will be taking instead of 15%.