Your welcome.
You are doing fine, if you know 60% of the course and are getting low A's in the mock then this should carry you forward in the exam with confidence.
I know a guy who did a financial accounting exam paper at uni, all he did was revise the mocks and he got 64% in the real exam, he literally printed out and revised and memorised the question of 8 mocks papers and in the exam he quickly pencilled down how to work this and that calculation, question out so this could jhog his memory.
All the best!