originally i downloaded a csv file, then saved as excel workbook. in column G starting at cell 87 to 161 are negative numbers. i put in formula =ABS(c87) and dragged down. all return #value!, same if i paste special , multiply -1. i have checked the column is formatted as numbers. what am i doing wrong? i am slowly trying to improve my excel skills and not very learned. any formula that i have tried always gives me a #value! error. perhaps i am making the same fundamental mistake every time. please give me the basics.