Can anyone help me with this please.
I have a workbook with two sheets. On the First sheet I am trying to show when costs from the Second sheet relate to by PO and by Period.
On the second sheet I have invoice values that refer to 1) a PO and 2) a Period Work carried out.
For the life of me I cannot get the Sumif function to recognise the Year() Month() of the Period Carried out and Match these to the correct Month Year Column on the Summary sheet.
Hope this makes sense!
Sample workbook attached!
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