Hi I am trying to change my code, I've changed in the method from two to three parameters but it is giving an error 
"Compile Error: Global/WebService identifiers cannot be removed from managed application: Method String calculateTotal(String, String) "

I am not finding why, Please help, Thnaks in Advance !

I ma new to salesforce. Can anyone please tell what exactly is a sales process and i twould be of great help if you can provide relavent documents.

I am facing this error wile i am saving the class which implements webservicemock any help much appriciated

"for interview purpose" give me best Difference between action function and action support function??/