No IsNumeric('11,22,33') = 1 but cast ('11,22,33' as float) will raise an error. So isnumeric is not the perfect way to select data that will cast as float, money, or...

Of course this isnt a perfect solution:

What you would really like to isolate are values that won't cast as float like '11,22,33' or 1234e456', etc.

Your new function returns a value...