I am trying to correctly align a button in a grid:

I would like the button on the right to align with the text area above it.
My code looks something like this:
<div class="row">
<div class="col-xs-2">
Purchase Order
</div>
<div class="col-xs-10">
<textarea />
<textarea />
<div class="row">
<div class="col-xs-9">
<button />
<button />
</div>
<div class="col-xs-2">
<button />
</div>
</div>
</div>
</div>
I tried to add offsets and adjust the spacing of different columns ... the button is too far left or right. I tried to add a fixed margin on the left to the right button, this works, but it breaks the responsive design.
Note:
I can not use pull-right, it is deprecated in Bootstrap 3.
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