The question remains, however, whether the Commissioner was right in assessing the amount of taxable income at $4,923. That depends on whether the Commissioner should have taken the actual surplus received by XCO, $998, as representing the profit arising during the relevant income year from the carrying out of the scheme, or whether he was entitled to assess the profit on an emerging basis. In the absence of some definite direction in the Act, the Commissioner should, in an assessment of income, adopt the method of accounting which is in fact appropriate to the circumstances of the case, or which in other words "is calculated to give a substantially correct reflex of the taxpayer's true income" (Commissioner of Taxes (S.A.) v Executor Trustee and Agency Co. of South Australia Ltd. (Carden's Case) [1] ). Where the carrying out of a profit-making scheme extends over more than one year, the difference between receipts and disbursements in any one year may not give a true reflection of the profit arising or loss sustained in that year, and the assessment of profit on an emerging basis may be appropriate. The method of assessment adopted by the Commissioner in the present case would no doubt be appropriate if it were probable that the total amount of the debts - $260,440.38 - would be paid to XCO. On the other hand, if it is improbable that this total sum will be received, it is not right to regard the outlay of $4,002 as the cost of the total amount of the debts. According to the evidence that I accept, it was not intended or envisaged that XCO should or would receive any further payment on account of the debts assigned to it, unless the actions of W. J. Vine Pty. Ltd. made it necessary to make a further payment. It is of course a matter of speculation whether any further payment will be made, but the evidence does not show that a further payment is likely. Four years have now elapsed since the $5,000 was paid, and no further payment has been made. In all the circumstances, it does not seem fair to regard $4,002 as the cost incurred in gaining receipts that will total $260,440.38. There is no evidence that it would be in accordance with generally accepted commercial or accounting principles to regard $4,923 as representing the profit arising in a case such as this. In all the circumstances, it seems to me fair and appropriate to regard $998, the actual surplus of the amount received over the cost in the year in question, as truly representing the profit arising in that year. I hold that XCO has established that the assessment is excessive, and that the Commissioner should have assessed on a taxable income of $998.