I have the following data:

Supplier Item# Month PO Price Std Price
ABC 123 jan 2.5 3.0
ABC 123 feb 2.5 3.0
ABC 123 feb 2.5 3.5
ABC 123 mar 3.5 3.0
XYZ 567 jan 3.0 2.0
XYZ 567 feb 3.0 2.0
XYZ 567 mar 2.5 2.0
XYZ 567 mar 2.5 2.5

I am trying to create a pivot table that will show the following:

Supplier Item # Jan price Feb price Mar price etc.
ABC 123 $2.5 $2.5 $3.5
XYZ 567 $3.0 $.3.0 $2.5

My problem:
because the standard price for ABC/123 changed during the month of Feb, I
have 2 lines for the same item# with diff. prices (same for XYZ)..so when i
create the pivot table, and use "sum of PO price" as data..the pivot table
actually give me the sum of the 2 line for Feb which = $5.0 instead of $2.5

is there any way to fix this so it will just give me $2.5 instead of $5.0?
any suggestions?

thanks,
susan