Thank you very much Fox. Your response is very much appreciated.

I don't mean to resist your solution, but the SumifS function seems far more simple. Are you just partial to the INDEX function or do you believe that the SumifS function will not work with multiple conditions when they are spread over both Rows and Columns? I swear I have used the SumifS function in instances just like this before, but I could be wrong. Can you offer me any clarification in terms of the suitability of the SumifS function in this circumstance?

Again, thank you so much.