Give discount, but still show original price

Give discount, but still show original price

Hi,

Wondering how to have my invoice/estimate show the total item price, then discount, and then amount due.

Right now it will only show discount and amount.

Example. $300 line item. It shows discount 10%  amount $270.    I want the customer to also see that the original price was $300, not only the discounted price.

Any help greatly appreciated :)