(b) the aggregate ofi. 4/5 of the amount that would be determined under subparagraph a of the second paragraph in respect of the taxpayer for the year if that value did not take into account amounts included or deducted in computing the taxpayer’s income for any preceding taxation year,
ii. 3/5 of the amount that would be determined under subparagraph a of the second paragraph in respect of the taxpayer for the year if that value did not take into account amounts included or deducted in computing the taxpayer’s income for the year or any preceding taxation year other than the last preceding taxation year,
iii. 2/5 of the amount that would be determined under subparagraph a of the second paragraph in respect of the taxpayer for the year if that value did not take into account amounts included or deducted in computing the taxpayer’s income for the year or any preceding taxation year, other than the second last preceding taxation year, and
iv. 1/5 of the amount that would be determined under subparagraph a of the second paragraph in respect of the taxpayer for the year if that value did not take into account amounts included or deducted in computing the taxpayer’s income for the year or any preceding taxation year, other than the third last preceding taxation year; and