There's no dedicated OUTs/EXF on the MyDevices but all you need to do is scan the label/put in the DCPI (Just go to search, switch the keyboard to numbers and go from there. No need to preface the DCPI with 49 anymore!). Near the middle of the screen it'll tell you how many are on hand and if there's any in the backroom. If there are, tap that and you've got a couple options here. One, it'll ask you how many are at a location; if there's several you can swipe to the location you're at. Put in the quantity and it'll create a batch to fill that location. Or if you just need more pulled? Swipe to "Get More."
While you've been doing this, you should have noticed a blue circle with a number up by the profile icon up top. The number is how many open batches you have. Tap to the profile page and the top will show each batch. To close and drop a batch, just tap the "Close" button. Item batches show up as a "ITM-???" I don't actually remember what the ??? is; fill group maybe? Be sure to let the backroom know you made the batch and all that if you're not going to go back and pull it yourself with a PDA.
At least, I'm pretty sure how it works; I spend most my time in Research mode these days.