Case #1:
If sku sale-price is less than list-price, sale price will be added to the basket.
Case #2:
If sku sale-price is equivalent to list price, sale price will be added to the basket.
Case #3:
If sku sale-price is greater than list-price, sale price will be added to the basket.
In all situations, sale-price will be displayed and add to the cart basket, because, the sale-price will override the list-price.
If sku sale-price is less than list-price, sale price will be added to the basket.
Case #2:
If sku sale-price is equivalent to list price, sale price will be added to the basket.
Case #3:
If sku sale-price is greater than list-price, sale price will be added to the basket.
In all situations, sale-price will be displayed and add to the cart basket, because, the sale-price will override the list-price.