freeze cell to use and auto calculate the data there?

[tjnapster]

hi
i have made a GPA calculation excel sheet now i what i want is that user only input the numbers of subjects and when he come to last subject he go to next cell to enter subject 1 and he cannot go to cell that is after subject 4 and those colums calculate and show results
the excel sheet is here
https://docs.google.com/file/d/0Bx6QGIK0Sz0rbWY2eEZYMDlUZDg/edit?usp=sharing

in this excel i want that user cannot edit total per G.P.A Grade Remarks
and when user come to subject 4 the cursor auto goto subject 1

 

[sdruley]

The link does not work. Also, I would suggest that you work with someone to reword your question so that it can be better understood in English.

 

[tjnapster]

the file is here
gpa excel.xlsx