Cells in Excel are referred to using relative or absolute references. A formula with relative references changes when the cell's position does. If, for example, a cell has a formula "=A1" and you ...

In such a situation, you can use what's called an absolute reference in Excel, which won't change when you drag or copy it from cell to cell. To create one, precede the row letter and column ...

Excel's AGGREGATE function lets you perform calculations whilst ignoring hidden rows, errors, or other functions that appear in the data.