A company's trial balance as of December 31, 20X5, is as follows:

Account	Debit (Dr)	Credit (Cr)
Cash	$60,000
Accounts Receivable	$80,000
Inventory	$90,000
Prepaid Expenses	$20,000
Property, Plant & Equipment	$300,000
Accumulated Depreciation		$40,000
Accounts Payable		$70,000
Notes Payable		$100,000
Common Stock		$150,000
Retained Earnings		$180,000
Sales Revenue		$400,000
Cost of Goods Sold	$200,000
Operating Expenses	$100,000
Income Tax Expense	$50,000
Dividends	$30,000

Calculate the following:

1. Gross Profit
2. Total Assets
3. Total Liabilities
4. Total Equity