A company's trial balance as of December 31, 20X2, is as follows:

Account	Debit (Dr)	Credit (Cr)
Cash	$50,000
Accounts Receivable	$70,000
Inventory	$80,000
Prepaid Expenses	$20,000
Property, Plant & Equipment	$200,000
Accumulated Depreciation		$30,000
Accounts Payable		$60,000
Notes Payable		$100,000
Common Stock		$150,000
Retained Earnings		$200,000
Sales Revenue		$500,000
Cost of Goods Sold	$300,000
Operating Expenses	$100,000
Income Tax Expense	$40,000
Dividends	$20,000

Calculate the following:

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