Place Excel file( with formulas on multiple worksheets) online

I made some sort of calculator in excel which calculates a total price based on options you can choose from drop down menus. (excel 2007)
I would like to place this online, so visitors can fill in the fields and get a total (but can't see the data and formulas).
The data is on multiple worksheets and there are no macros in the file.

Is this possible (without any complex programming)?

Thanks royUK,

I tried to save the file as webpage (which worked) but it doesn't remember the drop down tables.
Therefor I can not change the data.
Any idea how to overcome this?