Difficulties also would arise in determining the sales of each member and in the valuation of assets (e.g. historic cost versus market value), especially in the valuation of intangibles. These difficulties would be compounded by the existence across taxing jurisdictions of different accounting standards and of multiple currencies. Accounting standards among all countries would have to be conformed in order to arrive at a meaningful measure of profit for the entire MNE group. Of course, some of these difficulties, for example the valuation of assets and intangibles, also exist under the arm’s length principle, although significant progress in respect of the latter has been made, whereas no credible solutions have been put forward under global formulary apportionment.