Indent in relation to numeric cell value

All,

Attached is a sample spreadsheet created in Excel 2010.

Column A is an excerpt from a large workbook I am working on. My goal is to have the data in Column A indent based on its numerical value.

I was eperimenting and created an IF arguement in Column B; which somewhat accomplishes this. My concen is that if you hid column A, the formula in column B could be altered by accident.

I've tried to create a conditional formatting for this; to no avail. Any help would be appreciated!