A student has completed 16 credits in the table to the right during one semester. Grades are weighted so that

A=4.0;

A=3.7;

B+=3.4;

B=3.0;

and

B=2.7.

Course	Credits	Grade
Math 108	3		B+
Comparitive Religion 121	4		B+
Spanish 321	4		A
Astronomy 111	4		A
Astronomy Lab 112	1		A

Find the student's GPA for the semester.