Try this formula in B3 with Ctrl + Shift + Enter
=SUM(MID(0&A3,LARGE(ISNUMBER(--MID(A3,ROW(INDIRECT("1:"&LEN(A3))),1))*ROW(INDIRECT("1:"&LEN(A3))),ROW(INDIRECT("1:"&LEN(A3))))+1,1)*10^(ROW(INDIRECT("1:"&LEN(A3)))-1))
And in C3
=TRIM(SUBSTITUTE(A3,B3,""))
See the sample sheet as well.