You would happen to pick the AC unit.
VA = Volt-Amps - loosely watts
Watts = V * I
Watts = V * I * Cos(theta) for AC circuits; Cos(0) = 1 for non-motor loads
FLA = Full load amps or what the unit draws at full load. Motors may not operate there.
LRA - Locked rotor amps. Usually what the motor draws at startup.
There is an inexpensive device in various varients called the Kill-a-Watt. It can help you determine energy usage for 120 V appliances that plug into the wall.
Remember too, that energy usage is time dependent, so the cost to run an AC depends on how long it's on.
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