For wicks, say your wicks cost (from supplier) is $7 per bag of 100. I would add 1 or 2 dollars for shipping (I figure it's only part of an order, I don't usually order just one thing from a supplier due to high shipping costs.) Total cost for you is $9 per bag of 100. Each wick is 9 cents. Additives: what I did was I measured out a half pound of stearic. Then I measured out how many tablespoons the half pound contained. According to my calculations, there are 50 tbsp. per pound. Take the cost from supplier (don't forget to add some for shipping) divided by 50 tbsp. per pound. I really hope I've explained this clearly, lol. You can PM me if you want. HTH!