Current Liabilities (Owners equity, Balance Sheet).?

Hey guys, I can't figure this question out for the life of me, any help on understanding this would be appreciated,

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b) property tax payable 13000-addition to liabilities (15600/12×10 months from aug 2007 to june 2008); property tax expense deduction-from net income

c)interest payable 500-addition to liabilities( from 1500/3;june 1 to june 30); interest expense-deduction from net income

d)accounts payable-furniture 21000-addition to liabilites; no effect on net income

e)unearned income 22500-deduction from net income; no effect

on liabilities

trying to help..i'm not sure if these are all correct though.