A score of 70 at the University of Sydney is equivalent to 6 credits of gpa course, with a score of 70 (C).

1, standard algorithm: GPA = [(92 * 4+80 * 3+98 * 2+70 * 6+89 * 3) * 4]/[(4+3+2+6+3) *100] = 3.

2. Common algorithm: GPA = (4 * 4+3 * 3+2 * 4+6 * 2+3 * 3)/(4+3+2+6+3) = 3.00.