The figure shows a screenshot of the Create Copy Operation dialog.
On the From side, the Type field is set to "Expression" and the Expression box contains the following value:
120 * bpws:getVariableData('inputVariable','parameters','/client:processRequestQuoteElement/client:param0/client:quantity')
On the To side, the Type field is set to "Variable". It shows the following tree hierarchy:
Variables > Process > Variables > inputVariable (not expanded)
Variables > Process > Variables > outputVariable > parameters > client:processRequestQuoteResponseElement > client:return > client:supplierPrice. This item is selected.
Variables > Process > Variables > outputVariable > parameters > client:processRequestQuoteResponseElement > client:return > client:supplierName