Remove prices from menu

How can I remove the prices so I can go back to having just one base price for my products and remove the product break downs. when I put all 0's in it makes it free.

If you put 0 in the price value for your first and third lines of price and save, you should just have the second line left. It's not what you get ?

Otherwise, please make sure that you're using the latest version of hikashop as there was a problem in previous versions with the deletion of prices.