Here are the official pricing and upgrade paths for Fantasy Grounds Unity.

Fantasy Grounds Unity
Standard
$39.99

Ultimate
$149.99

Standard to Ultimate
$110

Upgrades from FG Classic
Upgrading from Fantasy Grounds (Classic) to Fantasy Grounds Unity will use our bundle system to discount it based on your existing license.
Upgrade FG Standard to FGU Standard
$31.99 (20% off)

Upgrade FG Ultimate to FGU Ultimate
$89.99 (40% off)