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I'm having trouble calculating the totals in the grid box. What I mean by that it I have to click back and reload the page for all my totals to correctly add up whenever I add newly added food. Any suggestion? 
Hi Sebastian,
Not sure i understand you correctly.
But if you need just "udpate" list and numbers - you should just invoke datasource that's populate your grid.
You can do it with two general ways:
1 With event linking (action - "Invoke service").
2 With JS code:
pre
//Note: you should replace "dataSourceName" with your datasource name.
service.dataSourceName.execute({});
/pre
Regards.