Where an individual exchanges all the common shares of Opco, having an ACB of $100,000, a paid-up capital of $500,000 and a fair market value of $600,000, for treasury shares of another class having a fair market value and stated capital of $600,000, s. 85(2.1) will only reduce the paid-up capital of the treasury shares received on the exchange at a time of computation subsequent to the time of the exchange, and will not eliminate the deemed dividend.