Formula Horizontal and Vertical Result excel

I would like to have a sum for horizantal and vertical data ; but i couldnt regonize which formula i have to use , sum or sumif , match index....
I am not expert in Excel but i have an urgent case and i count in your support please because i have to finish tonight otherwise i will have problem tomorrow morning

You can find in attach example for my need

Please please urgent support

the need as shown above that i have the sum for each P according the W.. number like i need sum of P1 for W4

File in attach now

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Originally Posted by djapigo

Since you seem to be using an old Excel version try this array formula for cell B21... make sure to CTRL-ALT-ENTER the formula to get the "magic curly brackets"...

=SUM(($A$3:$A$16=RIGHT($A21,LEN($A21)-6))*($B$2:$I$2=B$20)*$B$3:$I$16)

Shouldn't it be CTRL+SHIFT+ENTER?