I'd guess your hockey numbers are right there.
But how much did the Fighting Sioux Club, a body outside of UND Athletics reporting-wise, make? Those numbers don't get reported directly with the ones you quote (because they aren't UND Athletics).
But the bigger question is this: Why are you arguing about how much money hockey makes for UND when it is clear that UND Hockey alone generates more revenue than all of Bison Athletics? The $4.8MM number you will even go with is roughly 3/4 NDSU's entire athletics budget!
Food for thought:
2002-2003 Academic Year NCAA Total Attendance Numbers (may be differences in number of home games):
School MBB FB WBB Hockey Sub-total
UND: 47,924 56,930 38,497 256,591 399,942
NDSU 48,770 63,721 44,885 000,000 157,376
It takes money to play; money comes in through the gate first.