If you don't have excel download Open office
http://www.openoffice.org/
It has all the same types of programs as office professional Eg. wordprocessor, spreadsheet, database, powerpoint etc. It can read and write microsoft files. Its FREE, most that use it thinks its better than the microsoft offering and it is continually in development being opensource. There are thousands of plugins to help you do what you want. Its only 127MB. It doesn't suffer from all the security threats that Microsoft office does. It has a version for just about any operating system.
What can I say I'm an Oo Fanboy
OnTarget