There is no right or wrong answer, I doubt whether you ll get any more satisfactory answers than for your last question.Just add up your costs and then add however much you want to make in profit. It s up to you. 100% profit is fairly normal. Just make sure you don t price too high. If you find your sales are slow, perhaps drop the price slightly.
the tax man vat and council business rates will want their share as well. if you ve got enough money saved up to pay your wages for a year pay any rented property, vehicle costs, deliveries collections,for the year plus materials including say 200 t shirts to get going, add all that up and if you are prepared to gamble on it being a success then go for it (without takings for self for the first year. can you work 24/7 to try and make it work?
It all depends.. you want to set up competitive price?? or you know that you are unique in your product.. and so you can add extra amount of profit for your unique product/ service?? As the simplest you can do .. calculate the total costs other than the T-shirts / year.. then the total will be the adding costs.. which will be A Then calculate (your prediction of how many shirts you can sell / year ?? try not to be pessimestic nor optimist.. ) Then calculate the total costs of the T-shirts you predicted to sell .. say .. BAdd the total of A + B = total costs = C .. Then you can multiply total costs = (C) multiply it x 2 or x 3 ....... it is up to you even if you want to multiply it for more than that .. After the multiplication.. just devide the last number on the number of your prediction of sold T-shirts.. .......... this would give you how much you could charge / each T-shirt.. hope this help... good luck , and Have a great day .......