Selling B2B – having trouble getting up and running.

Hi to all Amazon seller people. I have been trying to get up and running on seller central for about two months now, attacking here, thinking it through, and then attacking there. I’m at a point where I have my business account in Seller Central and even got my first product up and approved. But, I only want to sell to other businesses – no retail. I learned through the online Amazon instructions that you have to have a business price and leave the regular price empty. I learned that after the fact. So, I zeroed the regular price and put in a business price but the regular price reinserted automatically. It couldn’t be deleted. I then read that I have to delete the product and recreate it, but leaving the regular price empty put in a business price. I thought I deleted it, but when I recreated the item it came back with the retail price still there. I went in a circle. Any help understanding what to do? Thanks in advance!