What is the difference between 2 licenses?

Standard
Starting from
$489.00/application
(Single license $679.00)

What is the difference between per application license and single license? They quote different price.

Dear Jeff, you're not the first use who's asking about that.
We're changing that page to make it more understandable.

$489/application is the lower price we provide on our ecommerce.
It's applied if you purchase 6+ licenses at the same time.

Single license $679 is one license price for a single application.

Ho it could be more clear.