I am using some formal in Excel. I had just recently upgraded my Office suite to Office 2007. The formula that I am using is =IF(ISNUMBER(K19),SUM(C19:K19),""). Now in the cell where the formula lies is having a yellow exclamation mark at the top corner. It says that there is some error with my formula. I am unable to find how to get rid of that error. I hope there will be some working solution available for the same.
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