Hi again all:
I have Input sheet with two parts information, its first part related to
Works sheet has no problem. But the second part related to Material sheet
doesn't work correctly.
Input sheet part two:
A37:A69 Material Names(Text).
B36:F36 Seller Names (Text).
B37:F69 Material Price (Value).
These are related to Materials Sheet which is like:

A2:A34 Same Material's Names.
B2:B34 Dropdown list of sellers.
C2:C34 Respective seller price in Dropdown list cell.

I used this
=INDEX(Input!$A$37:$F$69,Match($A2,Input!$A37:$69, 0),MATCH($B2,Input!$36:$36,0))

Merely C2 price was shown correctly rest up to C34 with #REF.

Could you instruct me please.
Cheers.