Grade Ponit [Mark theke]
=IF(C5="AB","ABSENT",IFS(C5>=80,5,C5>=70,4,C5>=60,3,C5>=50,2,C5>=0,0))

Total Mark
=IF(OR(C5="AB",E5="AB",G5="AB"),"ABSENT",IF(OR(C5<50,E5<50,G5<50),0,SUM(C5,E5,G5)))

Average Grade Point [GPA]
=IF(OR(C5="AB",E5="AB",G5="AB"),"ABSENT",IF(OR(C5<50,E5<50,G5<50),0,SUM(D5,F5,H5)/3))

Letter Grade [GPA theke]
=IF(J5="ABSENT","ABSENT",IFS(J5=5,"A+",J5>=4,"A",J5>=3,"B",J5>=2,"C",J5>=0,"F"))

Rank [Position] GPA theke
=IF(J5="ABSENT","ABSENT",IF(J5=0,0,RANK(J5,$J$5:$J$9,0)))

Commet [GPA Thele]
=IF(J6="ABSENT","ABSENT",IF(J6=0,"FAIL","Pass"))

Student Name thke GPA
=VLOOKUP(C15,$B$3:$J$9,9,0)