SUMIF Rows and Columns Not working

1 A B C D E F G H I J
2 M M M M M T T T T
3 12PM 1PM 2PM 3PM 4 PM 12PM 1PM 2PM 3PM
4 12 .5 0 .5 .5 .5 0 0 0 0
5 13 .5 .5 .5 .5 .5 0 0 0 0
6 14 0 0 0 0 .5 .5 .5 .5 .5
7 21 .5 .5 .5 .5 .5 .5 .5 .5 .5
8 22 0 0 0 0 0 0 0 0 0
9 23 .5 0 .5 0 .5 0 .5 .5 .5
10 24 0 0 0 0 0 0 .5 .5 .5
11 31 .5 0 0 0 .5 .5 .5 .5 0


Good morning,

I have the following table and I can trying to use this formula to no avail:

Formula:

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Thanks for the help!

M