771.1.1. In this Title, the income or loss of a corporation for a taxation year from an eligible business carried on by it means the aggregate of(a) the income or loss of the corporation for the year from the business, including the income or loss of the corporation for the year that is incident to or pertains to that business or from any property that is used or held principally for the purpose of gaining an income from that business, but excluding a dividend that is deductible under Title VIII of Book IV or under section 845 in computing the taxable income of the corporation for the year; and
(b) the amount included under section 92.5.2 in computing the income of the corporation for the year.