It would then display

  • the original price with a strike through and
  • the new price underneath.

For each sale product

  • set the sale price as override and
  • select Overwrite final.

Then

  • the original price (Base price with tax) will have a strike through and
  • the Sales price will show.

In the example below the prices selected for display in config are set to 

  • Baseprice with Tax, but without discounts and
  • Final salesprice only.

You can change the price names using language overrides.

discprice