C1   VERIFIED  billing/refunds.py:11    reviewer test passes
C2   VERIFIED  billing/refunds.py:8     reviewer test passes
C3   VERIFIED  billing/invoice.py:3     reviewer test passes
C4   VERIFIED  billing/api.py:6         reviewer test passes
C5   VERIFIED  billing/refunds.py:12    reviewer test passes
C6   VERIFIED  billing/refunds.py:7     style, accepted by review-m4
C7   VERIFIED  billing/refunds.py:9     reviewer test passes
C8   VERIFIED  billing/refunds.py:11    declined, accepted by review-m4
C9   VERIFIED  billing/refunds.py:13    reviewer test passes
