text: To work out your wax cost , take the total cost of the wax including shipping fees and divide that by the amount of wax eg if you bought 5 kg of wax you would divide the cost of it by 5000 that would give you the cost of 1 g of wax , then multiply the cost of 1 g by the weight of your melt / candle so if your melts weigh 10 g each multiply the 1 g cost by 10 that will give you the cost of wax for 1 melt . Use the same method for your fragrance oil so cost divided by 50 ml or however big your bottle is to find out 1 ml cost etc .