Help Neede In Scripting

Hello
i am using zoho creator quiet frequently and i like it a lot,
i wanted to upgrade the known expense tracker
http://creator.zoho.com/demo/latha/expense-tracker/zsdemo1/#

i would want to have email updates as my budget reaches certain defined limits as i predefined for each different expense category
i have looked at the help api and could not find any reference if it is possible to do the following :
1. receive scheduled email when a certain criteria has been passed
2. create sum fields that would sum my each category each month and those fields could be the criteria for mailing.

i would appreciate the help
thanks
tal