Amazon Seller in need of some advice, not getting the sales I think we should be getting.

So, I own an Office Furniture dealership that started selling online 2 years ago, both to our own page and Amazon. Presently, we have around 350 items on our Amazon page, and 176 of them are lowest price, yet we usually only make 1-3 sales a day. Sometimes, we can go a few days with nothing. While selling on Amazon is a nice addition to our regular business, and we are not relying on the sales, it seems to me we should be getting more sales. We sell brand name Office chairs and desk that our in high demand. So the question is, am I doing something wrong? Is there something else we should do to increase sales? Open for any and all suggestions. Thank you in advance