Ketchup machine - once 3 ketchups have been made and is stacked there, the 
machine won't do anymore, but you can put 3 boxes of tomatoes to hold at bay,
so once you move the boxes, the machine can continue with ONE order.

Cheddar Machine - once 3 cheddars have been made and is stacked there, the 
machine won't do anymore, but you can put 3 bottles of milk to hold at bay, 
so once you move the cheddar, the machine can continue with ONE order. Once 
the machine gets going with that order, then you can add another bottle of 
milk so as to fill the 2-bottle requirement.

Jam Machine - once 3 jams have been made and is stacked there, the machine 
won't do anymore, but you can put 3 boxes of grapes & 3 combs of honey to 
hold at bay, so once you move the finished jam, the machine can continue 
with ONE order. You will be able to add 2 more boxes of grapes, that will 
allow another jam to be made, once that starts, you can add the last box 
of grapes. 

Bread Machine - once 3 breads have been made and is stacked there, the machine 
won't do anymore, but you can put 3 boxes of wheat, 3 bottles of milk & 3 eggs 
to hold at bay, so once you move the bread, the machine can continue with 
THREE orders non-stop. This is the best one.