E) Company Belkin Inc, shows the following Balance Sheet.

Assets			Liabilities & SHE
Cash		5000	Accounts payable		5000
Prepaid rent		1000	Salaries payable		2000
Unexpired insurance		4000	Unearned revenue		3000
Accounts receivable		6000	Income taxes payable		5000
Supplies		5000
Current assets		21000	Current liabilities		15000
			Notes payable		55000
Automobile	50000		Total liabilities:		70000
Accoumulated depreciation: auto	-10000	40000	Stockholders` Equity:
Equipment and music	40000		Capital stock		3000
Accoumulated depreciation: equipment	-11000	29000	Retained earnings
			Total stockholders` equity
Total assets		90000	Total liabilities and stockholders` equity		90000

Which is the amount of retained earnings?

What is the net book value of the company?