Hi anybody..., i am new here. I have little trouble in my Excell application in any version (2000, XP, 2003). Have all of you to try @SUM function in this application with more than 18 digits. eg. (3512641584565789200 + 3512641584589852100 + 3452745584568784300). I never get the right result. why this problem can be haven. I work at my company always operate with excell, i sure excell is a microsft better program. can anybody try help me.