§241-4 Measure and rate of tax. (a) The measure of the tax imposed by this chapter is the entire net income from all sources for the preceding calendar year, or in the case of a taxpayer operating on a fiscal year basis, for the preceding fiscal year. The tax shall be at the rate of seven and ninety-two one hundredths per cent of the entire net income from all sources.
(b) The "entire net income from all sources" shall be determined in the same manner as the "taxable income" of a corporation, as provided by chapter 235, with the following changes and adjustments: