Node within a repeating node

So is there a way to reference the correct XPath of a field within a non-repeating node within a repeating node in K2DataGrid?

My workaround is to copy the fields in code in a webservice that kicks off the K2 process to a simpler schema than the original and then send two documents in, but is there no other way?

Example:
<Root>
<Items>
<Item>
<Price/>
<Qty/>
</Item>
<Item>
<Price/>
<Qty/>
</Item>
</Items>
</Root>

I'd like to have a list of Price and Qty displayed in a data grid?

Thanks.