Your final grade is given by
G=.5*(T1+T2+T3)/3+.4*F+.1*H
Where T1, T2, T3 are your grades from tests one, two and three.
F is your final grade and H is your homework/quiz grade.
Note: This automatically replaces you lowest score with the final
if the final is higher.
If you want to replace your two lowest grades with the final hit the Compute button twice.