Is there a simple way to sum a row of cells that have leading text?

I have 3 cells – they contain these 3 values beginning with ‘x’ with a sum of 15 that I have input manually for now.

Is there an easy way to sum the 1+4+10 to get the 15, in the 4th column?

I can cut the x off the beginning with this formula:

How do I cut all the x’s off A1:C1, and sum the values in cell D1? I can only use cell D1 for my total.
I have tried this:

Note: The leading text is always the same!
Note: This is just a minimal reproducible example. My real data has 100 columns.

Many thanks

UPDATE:

here is a snip of the answer!

>Solution :

I would go with the following:

=RIGHT(A1,LEN(A1)-1)+RIGHT(B1,LEN(B1)-1)+RIGHT(C1,LEN(C1)-1)

Or:

SUBSTITUTE(A1,"x","")+SUBSTITUTE(B1,"x","")+SUBSTITUTE(C1,"x","")

Edit: JvdV has a really good suggestion of:

=SUMPRODUCT(--SUBSTITUTE(A1:C1,"x",""))

which sorts the OP’s issue neatly.