No, that is per cab. Maybe a slight surcharge because of extra people. With 4 people, then it should not be more than $10-12 per person, $40-48 total.
2007 - Majesty of the Seas (Bahamas)
2009 - Enchantment of the Seas (Western Caribbean)
2010 - Freedom of the Seas (Western Caribbean)
2013 - Golden Princess (Alaska, roundtrip from Seattle)