Hi all

I have protect excel sheet1, which we have enter data in many column.
I have create another sheet2 for summery. here we have use 2 criteria like
Buyer and mode (ship or air)
its working fine.
C D E
buyer air_qty sea_qty
XX 100 200

In Column D
=SUM(IF('data'!$F$6:$F$115=C2,IF('data'!$AX$6:$AX$ 115="Air",'data'!$L$6:$L$115,0),0))
In Column E
=SUM(IF('data'!$F$6:$F$115=C2,IF('data'!$AX$6:$AX$ 115="Sea",'data'!$L$6:$L$115,0),0))


Its working fine. now I want add another criteria like PM in column B
(Production Manager) and in data sheet
PM column is E.

condition 1. If pm is Nill then sum qty buyerwise and mode wise respectively
condition 2. if Pm is given and buyer is null then sum Qty PM and Mode wise
respectively
condition 3. if Pm is given and buyer is given then sum of quantity PM,
buyer and Mode wise

B C D E
pm buyer air_qty sea_qty
XX 100 200

how can change formula or any other ways please help me

Thanks in advance
RKS