Last semester, Marcus took four classes. His Math class was 3 credits and he got a B. His Elementary Methods class was 6 credits and he got an A. His Biology Lab was 1 credit and he got a C. His French class was 4 credits and he got a B. At his university, an A is worth 4 points, a B is worth 3 points, a C is worth 2 points, and a D is worth 1 point. What was Marcus' GPA last semester? If needed, round the GPA to two decimal places