Do PP territorial bonuses stack?

Quite a vague title I know but do territory controlled bonuses stack?

For instance, Mahon's Controlled territory perk is "4 times greater production and consumption of all agricultural goods and equipment. 5% price reduction in agricultural goods and equipment." However, faction specific bonuses also have what seems to be a separate perk:

Empire/Federation - "50% reduction of all production and consumption of all agricultural goods. 5% increase in price of agricultural goods."
Independent/Alliance - "10% price increase of agricultural food goods 4 times greater consumption of agricultural goods. 5% price reduction on agricultural equipment."

Does this mean the Controlled perk of 5% price reduction stacks with the 5% price reduction of Independent and Alliance systems resulting in a 10% price reduction?

Also, given that there a 4 times greater production of agricultural goods and equipment doesn't that equate to lower prices on said equipment given there's more produced? Potentially you could make a pretty good profit that trade tools wouldn't pick up on... Am I right in this assumption?
 
A post from Michael suggested that they did, but I took a quick look in another system and didn't see it. Honestly, with the various flakiness kicking around at the moment it's hard to tell.
 
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