They look like a typo, but they’re the reason your table formulas don’t break.

Reference: The cell or range of cells or range of cells for which you want to return the column number. It is optional. You will notice that the cell will return the cell number of the cell that ...

Microsoft Excel relies on two fundamental reference types when addressing other cells. Absolute references -- which are denoted with a "$" -- lock a reference, so it will not change when copying the ...