Finals Calculator
First, you enter in your grade before you take the final. You enter it 
as a number grade than one as a percent. Then you enter in decimal form
the amount your final is worth. Then you will see a screen saying "PRT
ON FINAL" and "OVERAL GRADE". PRT ON FINAL is what percent you get on 
the final. You use the up and down arrows to manipulate the percent on
the final by 1. (It can't go below 0 or greater than 100) OVERAL GRADE
is your grade with the final percent.