“…in the case of a business whose residual costs are predominantly property-related, the existing method does not, in our view, provide as coherent a proxy for the use of those costs as does the floor space 45 method proposed by [LCM]. That method, as we have found, takes account of the economic use of the floor space (including the effect of the non-chargeable catering supplies) and thus the use and 13 consumption of property-related costs, in a way that the existing method fails to do. The treatment of non-property related costs we regard as neutral as between the two methods. Accordingly we conclude that the proposed method is more fair and reasonable then the 5 existing method.”