这个公式可以做到:
=SUMPRODUCT(--LEFT(TRIM(MID(SUBSTITUTE(A1,",",REPT(" ",999)),(ROW(INDIRECT("1:" & LEN(A1)-LEN(SUBSTITUTE(A1,",",""))+1))-1)*999+1,999)),FIND("-",TRIM(MID(SUBSTITUTE(A1,",",REPT(" ",999)),(ROW(INDIRECT("1:" & LEN(A1)-LEN(SUBSTITUTE(A1,",",""))+1)&"-")-1)*999+1,999)))-1))