Create a discount of type “percent discount” and value 50.
Set “minimum spend” to 10.
On the restrictions tab, select the 3 products in the “products”-field.
Thank you for the reply.
I actually tried that, the issue is the cost of the “sale” item is $18. So, just adding that item satisfies the $10 purchase amount. How could I do the same thing, but not count the three items towards that $10 limit?