Show how the balance payment value R733 760.42 for month 1 was calculated

R733 760.42 = (R1 000 000 x 0.7) + (R1 000 000 x 0.2 x 0.3)

R733 760.42 = (R700 000) + (R200 000 x 0.3)

R733 760.42 = R700 000 + R60 000

R733 760.42 = R760 000