Ok well 2 spreadsheets. I want to match one amount column with another amount column in another spreadsheet. If there is a match I want a cell in that row to change and say "July-03" for example.

The ID for that amount should also match with each other, and there should be the same ID in both spreadsheets however in case of errors I wouldnt want it to search for an exact ID value. Let me know if that helps.