For the purposes of these formulas,(1) A is the total of the duties provided for in section 79.11 that the person has collected or should have collected under subparagraphs b and d of the first paragraph of that section and that the person is required to pay under subparagraphs c and e of the first paragraph of that section, the specific tax and the amount equal to the specific tax, if any, that the person has collected or should have collected under Title II of the Act respecting the Québec sales tax for the particular reporting period ;
(2) B is the number of days in the particular reporting period ;
(3) C is the total of all amounts each of which is the total of the duties provided for in section 79.11 that the person has collected or should have collected under subparagraphs b and d of the first paragraph of that section and that the person is required to pay under subparagraphs c and e of the first paragraph of that section, the specific tax and the amount equal to the specific tax, if any, that the person has collected or should have collected under Title II of the Act respecting the Québec sales tax for a reporting period ending in the twelve-month period immediately preceding the particular reporting period ; and
(4) D is the number of days in the period commencing on the first day of the first of those preceding reporting periods and ending on the last day of the last of those preceding reporting periods.