I received an email saying i could purchase a onetime Parallels' license for $99, but when I go to check out the cost goes up to $129. I'd like to buy today to get the 20% off. Is there a way to check out with the $99 price and then get the 20% off so the total is $79 like the emails says? Thank you for any help you can offer. I've attached a screenshot of the email Parallels keeps sending me. I've also attached screenshots of where it says it cost $99 and then I click on the $99 option and it goes up to $129.