Correction" (1) In Right hand side of Equation (2), "Bj" should be "Tj" (2) "tj" in equation (3) should be "Tj" The correct one is shown below: An+Rni * B = Kni/Tni for all "n" and "i" ---------------------------------------------(1) Sum over n (An)+Rj *B = [Sum over n (Knj)]/Tj for all "j"------------------------(2) Sum over i (Tni)+sum over j (Tj) =T for all "n"-------------------------------------(3) Sum over n and sum over i (Tni * Rni)+sum over j (Tj*Rj)= C ------------------(4)