Help me with forms please!

[CloudSlash]

I could not find any other forum for html, so i decided to ask in this one. I need to knwo how to do two things with forms.

First of all i want to make it so that when i push submit on my form, instead of having the action set to email it to me, post the results in a text document on the server.

Secondly i want to know if there is a way to add a little thing into the bottom of the form that adds up values you have specified as each checkbox or radio button is clicked on. Example: Grahpics cost $10, when you click on the graphic check box, a 10 will appear in the box at teh bottom fo the form. I have no idea if this is possible.