10.—(1) The product of the calculation in article 8(2), added to the product of the calculation in article 9(2), is (for the obligation period to which those calculations relate) calculation A.
(2) Where calculation A is not a whole number, it is to be rounded to the nearest whole number (one-half being rounded upwards).
(3) References to calculation A in articles 12 and 13 are to be construed accordingly.