Memory information relations

Hi,

I would like to know what are exact relations between these 3 memory
information printouts:

top:

Mem: 157M Active, 127M Inact, 60M Wired, 25M Cache, 60M Buf, 125M Free
Swap: 998M Total, 998M Free

sysctl -a | grep Mem:

Virtual Memory: (Total: 78781K, Active 798692K)
Real Memory: (Total: 497676K Active 174300K)
Shared Virtual Memory: (Total: 28884K Active: 22684K)
Shared Real Memory: (Total: 13768K Active: 10812K)

sysctl -a | grep mem:

hw.physmem: 527667200
hw.usermem: 453668864
hw.realmem: 536608768

So I would like to understand exactly which number is the sum of other
numbers here.

I have already read this paper: http://www.absolutebsd.com/AbsoluteBSD18.pdf
but still I don't even know exact relations between the numbers in "top" printout.

Thanks,
Nejc

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