btcapital

Why does subtracting cash and deferred liability from total liab and equity make sense? I understand assets = L + E, but how would subtracting cash and deferred tax liability equate to total capital?
I tried summing up debt and equity (in thousands):
Liabilities:
AP – 90
LT Debt – 520
Equity:
CS – 600
RE – 360
NI – 145
Total:1715
I noticed the difference between interest and income tax expense is 15, didn’t think it made sense, but that’s the only thing I saw would work out mathematically.
Thanks for the help.