I have a work sheet where in column C and D where c1=c1+a1 and d1=d1+b1 etc, I have set the iteration in the "calculation" under tools to 1 yet when i enter a digit in A cell D also changes, same thing happens to C when numbers are entered in B I have tried c1=$c1+$a1 and D1=$d1+$b1 but still the same thing happens huh Help me pls colleen