A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
There are Add-Ins that will display classic menus in 2013 such as this one:
Title: Show Classic Menus and Toolbars on Ribbon of Excel 2010 and 2013
Link: http://www.addintools.com/office2010/excel/
Have you tried increasing your monitor resolution?
Kevin