Matching 2 fields and doing a count

Please can someone assist.

I have a spreadsheet with various tabs per month. Each tab contain some data, I am specifically interested in 2 columns (Column I and Column M). As an example, in the tab Oct, I want to see how many times the name 'Ade A' appears in Column I and how many times 'L' appears in Column M. The count/sum of this I want placed in the tab 'Totals YTD' in cell D7. Similarly I want to do the same where the combination is 'Ade A' in column I and 'M' in column M, this value should be placed in tab 'Totals YTD' in cell E7, and then for 'Ade A' and 'H' in cell F7. I then want to repeat this for all the people in the file.

Additionally, in the 'Totals YTD' tab I want cells D7, E7 and F7 to count the data as above from each month, thus eventually cell D7 will have the data for 'Ade A' for each month as a total value.

Can someone assist me with a formula on how to do this?

I have attached a spreadsheet which shows what I am trying to do.

Thanks in advance.
shaz_79