Do you have tons of products? Would your customers prefer to order items in an easy and clean way? Make their lives easier.
Allow them simply to purchase via product lines (known as wholesale sheet lines or variant grid), making it easy to input the quantity of the variants they want to purchase. Few clicks and done. Order in bulk, without the need to go through every product screen separately.
Either create the order lines on per product basis or per store basis. You are free to choose.