129 A general practical approach to the measure of damages is to consider what would have happened if the breach had not occurred and compare that with what in fact did happen.[40] That is, the hypothetical situation compared with the actual. If these clients had not been taken from Mr Riboni's firm, the prospects were that they would have remained with him, although there was always a risk that some may have left. The value of his goodwill would be expected to remain at about the level at which it was when he purchased the business, but subject to variation according to the number of clients he had. He would have performed services for those clients, for which he would have been remunerated. Hence by losing a substantial number of clients Mr Riboni lost part of the value of his goodwill and also the net income which would have flowed from performing work for them. The question immediately arises as to how the Court determines the loss of income and for what period? The lost income would be the net profit from performing the services, because there would be an expense involved in performing the services. If there were less clients, there was every prospect that staff would have been dismissed and the wages bill would have been reduced accordingly. On the other hand, the fixed expenses would have remained. Approaching the task in this case, it is complicated by the fact that Mr Riboni's firm effectively ceased on 15 October 1991 when the agents of the mortgagees moved in and took possession of his practice. The evidence revealed that Mr Tropeano made approaches to the agents and acquired some of the clients himself, and Mr Riboni later reached agreement with the agents, recovered back some of his clients and recommenced his practice. Hence any loss of income arising from the loss of clients ceased in October 1991. In my view the Court should award damages to Mr Riboni for his loss of clients affecting his asset, namely, the goodwill, which on a dollar for dollar basis represents a loss of $81,551.75. It is not possible for the Court to calculate any loss of net income arising from the loss of these clients because there is no evidence which demonstrates the loss. The evidence of the value of the clients was based upon services rendered to the preceding financial year, namely, 30 June 1990. The wrongful acts occurred in or about May through to October 1991. It is unknown whether Mr Riboni performed services for the clients in the financial year to 30 June 1991 and whether he had been paid. There is a fair inference that he did and was paid. But for the period 1 July to 15 October 1991 there is no evidence to establish that if he still had the clients he would have performed services and been paid. The exercise could have been performed, the matter could have been investigated and proper evidence could have been placed before the Court which would have shown if there was a loss of income and how it was calculated. The Court in these circumstances expects the best evidence. The best evidence was an investigation of the circumstances and, if there was a loss, demonstrating it.