How to calculate Webi Overdue Count (XI 2)

Simple webi report

I need to Count if is overdue

Manager

Assign Count

Assign Completed

incomplete

Complete

Status

Overdue

Count

Jay Kumar

500

450

50

?

Bill Jones

400

375

25

?

Tina Cohen

300

295

5

?

Tiger wood

200

195

5

?

Jelly tiza

10

10

o

Completed

I need a overdue Count , I have a column in Complete status as set as Alerter if completed show green if over due in red if incomplete in red but how to count red incomplete from Complete status column for overdue I need the formula Thank You

Regards,