Tips
Set the 'list price' and 'our price' as the same price - and only the line 'our price' will show on the product page.
Do this for each item that you only want to show the one price.

Set the 'list price' and 'our price' as the same price - and only the line 'our price' will show on the product page.
Do this for each item that you only want to show the one price.