You must enroll and take 20 tests for credit. If after testing you have enough credits to graduate (and are age 16 or older) then you will graduate.
Enroll
and take 20 tests for credit - $105
Grading
fee for all 20 tests or any part - $75
If after six months of self study or course work you want to take a second battery of 20 tests for credit the cost is $105 and the grading fee is again $75.