Ops (Shipment)

I’m really slow when it comes to restocking I don’t know how to speed up. One of my coworkers can finish multiple boxes in an hour, and it takes me hours just to finish one. I do get stopped by clients sometimes, and I either help them or refer them to a BA, but I can tell I’m still slow in some areas of operations. I joined Sephora just a month ago, how can I become more efficient and quicker?