Perhaps because a small part of the cost of the product comes from the sticky stuff itself. Selling a quarter of the quantity may have 90% of the cost of sale.

Perhaps because a small part of the cost of the product comes from the sticky stuff itself. Selling a quarter of the quantity may have 90% of the cost of sale. So it might have to be $12 for a pack or, $11 for a small sachet, to be worthwhile.