E D P R I E N R G g , r , t = ∑ G c o u n t = 1 E D P R I L E N G r a d e S t u d e n t s G c o u n t , g , r , t {\displaystyle EDPRIENRG_{g,r,t}=\sum _{Gcount=1}^{\mathbf {EDPRILEN} }GradeStudents_{Gcount,g,r,t}}
