Hi Ganapathy,
You can use excel function to extract only numbers from string
please chk th eformula below
=SUMPRODUCT(MID(0&A13,LARGE(INDEX(ISNUMBER(--MID(A13,ROW($1:$25),1))* ROW($1:$25),0),ROW($1:$25))+1,1)*10^ROW($1:$25)/10)
here A13 is the cell value.
please find the attachment and change the extn to .xlsx.
Hope this helps you out