6. Among the sales concluded during the second fiscal period preceding the fiscal period for which the median proportion is being determined, the following shall be entered on the basic list:(1) the sale that is the last in chronological order according to the date on which it was concluded;
(2) the sales whose rank, according to such chronological order, corresponds to one of the products obtained when the quotient obtained by dividing the number of sales concluded during that second preceding fiscal year by the number of sales to be entered on the basic list is multiplied by each positive whole number lower than the number or sales to be entered on that list.
The quotient resulting from the division prescribed in subparagraph 2 of the first paragraph shall comprise 2 decimals. If a product resulting from the multiplication prescribed in that paragraph is a decimal number, the decimal is omitted and, notwithstanding the first paragraph of section 3, if the first decimal is greater than 4, 1 is not added to the whole number.