Various bases have been evolved in this country for computing corporation privilege taxes. Of special interest is the fact that seven states have made corporate surplus together with capital the basis for such taxes - Louisiana, Michigan, Mississippi, Missouri, North Carolina, Ohio, and Texas. The statutes of these states adopt either the gross value or the net value of the assets of corporations as the foundation of the tax, depending upon whether or not liabilities may be deducted. In fixing the amount of such a tax, some valuation of corporate property to determine the corporation's surplus is necessary.