I suggest pricing them a bit higher than you feel comfortable with. If you were thinking 35 then try 45. If you were thinking 45 then try 55. It will be easier to lower your price than to raise it. Ultimately you want to determine if there is a market for your bag and how much people think is a fair price for it. It's difficult to say without seeing the bag and just basing it off your cost of production. My suggestions are based on what you should be aiming for in terms of margin. You may not make any margin on the initial ones.

If you can sell some and prove market demand at the price point you are selling them at then you can borrow from a bank to buy a larger stock of materials to get a better price.

It's a grind but have fun with it.