“…I always come back to the sales value because as a company we have a margin that we work towards and we want to get similar margin for all of our products. And in an ideal world, obviously, the overhead cost would be the same for each pound spent on a product. Whilst we cannot guarantee that, we would, if we had products that were particularly burdensome because of the size or their complexity, we would from our experience of that type of product know that and seek to get a better margin at the top end to accommodate that ....”