1. Click Management from the main menu bar
  2. Click eStore (Cart)
  3. Click the category that the item(s) are saved under and the sub-category if needed
  4. Click the name of the item you need to manage
  5. Make sure you are on Step 1 – Basic information on the side of the page
  6. Click Manage in the Quantity Information section
  7. Set the Update Action drop down to Increase or Decrease
  8. Enter the amount you want to increase or decrease by in the Quantity Change field
  9. Click Save on the side of the page