spreadsheet for a thin client running on Windows XPe

Ladies and/or Gentlemen:
We have to provide one of our customers with a Devon IT thin client model 8020C with WinXP embbebed (WinXPe) and he needs to run a spreadsheet (like Excel), with a small and simple calculus to make loans payments projections.
This TC has only 80MB storage available for this application program.
Can somebody tell me if there is such a spreadsheet program?
I will appreciate any help!!!
Best Regards: Jose Solano