AC BTU Rating Help

Hoping for some help on an AC compressor BTU rating. It appears to me to be a 3-ton, but I am unable to find confirmation from any of my references. It is a 2007 Carrier unit with a model number of: 24ABR360A350 and a serial number of 3607E12775.

Thanks in advance…

24 = A/C (i.e. as opposed to a #25 heat pump)
A = Residential
B = Tier - base (whatever that means)
R = R22 (A=Puron)
3= SEER designation, 3=13, 4=14, etc
60 = 60,000 btu = 5 tons
A = standard variations
3 = 208/230 1ph
50 = ?
mfg = 36th week of 2007