To transform the variable sale, from the menus choose:

Transform
Compute...

Type logsale as the Target Variable.

Type LN(sale) as the Numeric Expression.

Click OK.

The log transformation is a sensible choice because Amount of Last Sale takes only positive values and is right skewed.

Recall the Frequencies dialog box.

Deselect sale as an analysis variable.

Select logsale as an analysis variable.

Click OK.