right superscripts of the matrix, comes from the application of (1). Then S(1) = 2(3 - 1) = 4 and the value of T is S(0) + S(1) = 9 + 4 = 13 units as may be verified with the use of T = sum ij Xijcij . Rows and columns may be interchanged, of course, to obtain values of Di ,