You can sell any upgrade, except for Staff Training, for 50% of the original purchase price.
To sell upgrades, do the following:
1. Click the stand containing the upgrade you want to sell. The Stand Info display appears.
2. Click Upgrades. The Upgrade display appears.
3. Click the arrows to select the upgrade you want to sell. The sale price appears in the Description.
4. Click Sell this Upgrade. A confirmation message appears.