|I suggest that you Google those exact words to see what you can find.|
Since the correct solution for your business will depend on a number of variables (how many users, size of database, features required, etc.) it would be really hard for anyone in a help forum such as this to suggest the correct application for you.
BTW I would consider suggesting something to help you with your original question about the spreadsheet, but I don't really understand what the problem is. If you are saving the file with the updated quantities, I don't see how they could revert to the old numbers.
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