title: Dynamic Excel Subtraction
body: <p>Say I've got cells A1-A10 populated with numbers. My initial formula in cell B1 is =A1-A6. However, I'd like to strike-out cell A3 (keeping the contents visible underneath the strike-out if possible), and I'd like the formula in B1 to recognise that change, and then automatically adjust itself to =A1-A7 (the idea being that I'd like A1 subtracted by the number in the cell 5 "non-struck out" cells below it). And then if I strike out cell A5 I'd like the formula to adjust itself to =A1-A8 and so on. Does anyone know how to do this?</p>