right, if we broaden the number of commodities, and recognize that er, farming is a multi-product enterprise, alright, farmers just don't produce one produce, alright, they tend to produce a whole range of products, and therefore we've got to accommodate these inter-relationships between prices of barley, prices of wheat, prices of oil seed rape,s and er, and so on and so forth, and there can be a nu a number of fairly complex inter-relationships er, there.