why would you ignore tax you still have to pay it, if someone gave you the 525 to buy the system and the headset you couldn't afford it. Simple as.
You ignore the tax in a discussion based on the "cost" of one product vs another because tax will also be applied to the other product in equal amounts, but at varying figures based on geographical location. --- If you're omnipotent and all-powerful...why would you need to REST? On the 7th or ANY day?