Display store currency under each line item, along with local curency.

[Gianluca8]

Hi everyone, 

Our accounting department is having some troubles with issuing invoices. Most notably, they need to key in the value of each line item in the order in USD. When an order comes in in CAD or EUR, only the total is shown in converted USD. Any app, or code I can add to show it per line item in the order overview page?