This is an auto furnace machine where it takes the items you place into the dropper and sorts them out into the correct furnace for the specific items. After being smelted, they pass through some more hoppers and are sent to the Storage Room where the items are stored in their own chests. Now each furnace is wired to set off the /say command to inform you of the progress of your items as they pass through the machine. Simply flip the Notification Switch so that the light is ON if you wish to get the notifications. Now each item you place into the machine will take 1L of XP away from you. This is the "Charge" for using the machine. Now if you place any items that can be used as fuel for the furnace, you may place it in the correct hopper that is identified and you will earn 1L of XP back. These command blocks do not turn off when the Notification Switch is activated. For any further help or explanation on a portion of the machine or how if you wish to make a video of my machine email me at tjacob66inbox@outlook.com  thank you for your interest in my machine!