The cost of Joe's new HVAC system is $20,000.  It includes 2 conditioning zones, each with 5 vents.  In dollars, what is the cost of the system per vent?
Two zones with 5 vents per zone is 2*5=<<2*5=10>>10 vents.
Thus, the $20,000 system costs $20,000/10 = $<<20000/10=2000>>2,000 per vent.
#### 2,000