In one aspect, the invention is a method to estimate travel costs using a spreadsheet application. The method includes receiving inputs in a spreadsheet file using the spreadsheet application. The user inputs include an origination, a destination, a start date and an end date. The method also includes...http://www.google.fr/patents/US20080103842?utm_source=gb-gplus-shareBrevet US20080103842 - TRAVEL COST ESTIMATING
