On 3/1/21, a private company has $150,000 in building assets, $300,000 in accounts receivable and $200,000 in accounts payable. The CGS for period is $100,000 and depreciation expenses are $50,000. What is the owners equity for this company at the end of the last period?

a. 200,000

2. 450,000
3. 250,000
4. None of the above