Hi, I'm new to advanced excel formulas so please bear with me.

So I'm trying to make a formula that sums only certain values in a range of
cells. The problem is I need to manipulate each cell content before
testing/adding to the sum (but not do this permanently of course). For
example, if i have a range of 3 cells that contain the values "P90", "PHP",
"B60", I need my formula to sum the last two digits of only the values
starting with "P" and that have a number for the last two.

I haven't been able to get something like this to work, even for really
simple formulas like counting the number of cells whose right character is
numeric or summing the right characters of all cells in a range. Any
suggestions? Maybe i'm thinking of this from too much of a programming
perspective?

Thanks
Daniel