I need MS Excel, but don\'t have the money to buy it. I work for my father and it is a small company on the verge of bancruptcy. So I get this email from a customer with a lot of work, only it has an attached .XLS file to fill out and mail back. Well I don't have the $300 to spend on MS Excel just for one file. So is there anywhere to buy this that is cheaper than just going to the local computer shop?