complete joomla module

I need a small task to complete. [login to view URL] in this look at the form on left that need to generate a price after taking selection. For refrence look at this [login to view URL] Logic is it generate price and user will click on booknow button and a form with details he filled in this module will open and have some more fields like name/email/number/adress and submit will send a mail to user and admin. More details in PM if require.