GPA Calulator

please add it so you can change ALL of your class grading scales at once. Oh and also just make the default range (if you have +/- turned on) to be the scale most schools use: A+ 98%-100%, A 93%-97%, A- 90%-92%, B+ 87%-89%, B 83%-86%, B- 80%-82%, C+ 77%-79%, C 73%-76%, C- 70%-72%, D+ 67%-69%, D 63%-66%, D- 60%-62%, F 0%-59%. why does a D- start at 56 on default settings? a 56 is an F!