Help with Offset/Match Formula

Hello. I have the formula below and I can't figure it out. It refers to a tab called CIP. F147 does= "priorCIPavg", so I just need to evaluate the true part of the IF formula. I would like the formula to return the value from cell AW435 in the attached sheet (all data has been deleted). Currently it is returning 0 I would appreciate any help. Also, if you could explain what is going on, I would appreciate it as well!!


=IF(F147="priorCIPavg",OFFSET(CIP!$AQ$393,MATCH(newPnLdate,CIP!$D$394:$D$451,0)-1,0),IF(F147="currAP+11",(((I80+I152)*1000)+paidhistdollars)/((H80*1000)+paidhistvol),IF(F147="Accrued",(((I80+I152)*1000)+accrhistdollars)/((H80*1000)+accrhistvol),lastmohistdollars/lastmohistvol)))