# The base row

**Single formula controls a column**

A Formula located at the base row (the row labeled with the "base" icon), controls all the cells at the same column. In the following screenshot, the formula

**=amount/10**in the

**tax**column sets the values of the cells across the column to be 10 percent of the corresponding values from the

**amount**column.

*Screenshot: the formula*

**=amount/10**controls the values of the**tax**column.Note that the formula

**=amount/10**is the only formula at the column - all the other cells are controlled by this formula.

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