(a) an amount equal toi. where the disposition occurred in the particular taxation year, the amount by which the taxpayer’s proceeds of disposition exceed the aggregate of the adjusted cost base to the taxpayer of the security immediately before the disposition and any outlays and expenses made or incurred by the taxpayer for the purpose of making the disposition, and
ii. where the disposition occurred in the 60-month period ending at the beginning of the particular taxation year, the amount, if any, deducted under paragraph b in computing the taxpayer’s gain for the preceding taxation year from the disposition of the security; exceeds