Using different valuation methods. A business has tangible assets of $875 000 and liabilities of $50 000 and produces a net profit of $56 000 per annum based on a turnover of $430 000. It is a professional practice (multiple = 2) and has a ROI of 7 per cent. There are no intangible assets. Calculate the purchase price for this firm using each of the book (asset) value, market value (revenue multiplier) and ROI methods. Which of these three methods is the most appropriate one to use? Give reasons for your answer.