I am a beginner in Excel and need help with this.

In Column "A" I have product prices, In Column "B" I have product codes
and in column "C" I have month values.

I can't get Excel to do following:

Check column C for appropriate month (example: 1) and then check column
B for certain code (example: 1001) and finally to check all values in
column A which match criteria (B&C) and to SUM it.

Please advice.

H.