Selling an item in 2 different units

Hello, 

  Our company is a food distributor to supermarkets/retailers. We currently sell our items per case and that is our OUM. We want to start selling on Amazon but for this, our UOM has to be an actual unit and not case. Is there anyway that we can have both UOM in my ERP for he same item? Also, is there anyway that I can have in the system a different warehouse with this UOM (item) and different pricing?  I'd appreciate your feedback. 

Thanks.