Add up values from matching fields in a linked Sharepoint list

I have 2 lists, say, Fruits & Orders.

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• Orders has a number field FruitID that links to the ID field of Fruits.
• Orders also has a number field OrderValue which stores the value of the specific order.

I want to find out the total sale for a particular fruit. I am doing this calculation in a workflow for the specific fruit. Is there an easy way (read 'no coding')?

See the list of standard workflow actions here:

http://office.microsoft.com/en-us/sharepoint-designer-help/workflow-actions-in-sharepoint-designer-2010-a-quick-reference-guide-HA010376961.aspx

There is no select, or looping functionality.

I suggest writing a custom workflow activity, sand boxing should work

http://www.wictorwilen.se/Post/Sandboxed-workflow-activities-in-SharePoint-2010.aspx