31 However, it appears from Mr Lean's evidence that he relied upon the financial performance of Cars-R-Us only for the purpose of comparing his own assessment of what percentage of Bruness' sales income would be consumed by its cost of purchases with the like percentage which had been derived from the financial statements of Cars-R-Us. It is plain, from the extracts from his evidence to which I have earlier referred, that he relied primarily on other, admissible, evidence in order to arrive at his conclusion. He said that he had relied upon his knowledge of Bruness' business (in particular, its historical trading), his knowledge that, because a large warehouser of motor car parts was only "a few minutes up the road", the business could reduce its stockholding and lower its purchases, the fact that, with an increasing volume of sales, the business would be able to command a volume discount on purchases (of 11/2 per cent), his general knowledge of other businesses (he had prepared financial statements for probably "a couple of hundred companies") and his (unchallenged) belief that the industry standard was slightly lower than 35 per cent.