Please try below
Input = "m m m m m m m $14,308 00"
Output = System.Text.RegularExpressions.Regex.Match(input,"\d+[.,]?\d*[.,]\d+").Value.Replace(".","").Replace(",","").Trim
Please try below
Input = "m m m m m m m $14,308 00"
Output = System.Text.RegularExpressions.Regex.Match(input,"\d+[.,]?\d*[.,]\d+").Value.Replace(".","").Replace(",","").Trim