**Minimum yearly repayment:** $9,857.98

The controlling authority is the Australian Taxation Office (ATO).

**Calculation**  
P = 50 000, r = 0.0877, n = 7  
(1 + r)^7 ≈ 1.80120827573  
(1 + r)^-7 ≈ 0.555182632  
1 − (1 + r)^-7 ≈ 0.444817368  
r / [1 − (1 + r)^-7] ≈ 0.1971596  
MYR = 50 000 × 0.1971596 = 9 857.98 (rounded to nearest cent)