=IF(C3="","",IF(IFERROR(VLOOKUP(C3,E:E,1,),"") <> "", "〇","×"))
=IF(IFERROR(VLOOKUP(E3,C:C,1,),"") <> "", "〇","×")
=IF(D3="×",IF(C3,"",""),"")
=IF(F3="×",E3,"")