If you are using the type R part as a component in the repair, then you have a couple of options.  If you are using the Convert to Work Order and using a Work Order to track the repair, issue the type R part to the work order using WO-G.  Make sure the SD-Q setting in Sales is set to Y for Show BOM in Release Service & Repair.  Then when you run SR-E to release the order, click BOM and you can indicate which BOM components you want itemized on the invoice and at what price.
 
If you are not using work orders, then you can enter the component in SR-A and enter a "K" as the Line Number.  This tells the program to treat the item as a Kit component, pull in the standard pricing, and then upon invoice posting, pull the part from stock from the warehouse Location specified.