When the commissioner does this he should not, in my opinion, estimate hypothetical profits at any stage independently of the actual profit at the final stage. He should take the actual profit as his basis and assign some portion of it to a source in New South Wales. It is doubtless the case, as a general rule, that the treatment or packing of goods in a particular manner increases the value of the goods so that a profit may have been made in the treatment and packing - the profit being the difference between the cost of creating the added value and the amount of the added value. Where a business involves dealing with goods in this way, market prices may provide a standard which makes it possible to estimate the net added value and to regard it as income derived in the place where the treatment and packing take place. But this will not always be the case, and it may be that no profit at all can be attributed to the treatment and packing. I have said that "a profit may have been made." I use this expression advisedly, because, if there is no room for the existence of such a profit in the final result, that profit cannot be regarded as a real profit derived from the operations of treating and packing. If, for example, the goods were ultimately sold at a loss, I conceive that it could not be contended that nevertheless income had been derived from intermediate operations such as growing or manufacturing or treating or packing or transporting. The question of the source from which the income comes can only arise if there really is taxable income (being gross income less a smaller cost of producing it) which is available for theoretical distribution among various sources. If there is no such income in the final result, no question arises as to the derivation of portions thereof. Thus, in my opinion, an unrealized profit at one stage of a series of operations, which operations culminate in sale, is in the strict sense never in itself taxable as income. It is easy to imagine a case where, at the time of despatch from Australia, goods appear to include an unrealized profit, but where they are ultimately lost or destroyed or sold at a loss. In such a case any hypothetical profit is also destroyed, because it can come into real existence only as part of an actual profit which enters into taxable income. In the case of Federal Commissioner of Taxation v. W. Angliss & Co. Pty. Ltd.[13] there were very special findings of fact that the goods exported could not have been sold in Australia for home consumption or for exportation, and that no value existed in the goods at the moment of exportation beyond the cost of production. The decision in Angliss' Case[14] depends entirely upon these findings. There are no such findings in this case and there is no evidence upon which such findings could be supported. In my opinion, therefore, the decision in Angliss' Case[15] has no direct bearing upon the decision which ought to be given in this case.