LunaTech Innovations provides its balance sheet in a detailed paragraph:

As of December 31, 20X10, LunaTech Innovations' total assets amount to $300 million, comprising $150 million in cash, $80 million in accounts receivable, and $70 million in inventory. On the liabilities side, the company has accounts payable of $50 million and long-term debt of $100 million.

Calculate LunaTech Innovations' total equity as of December 31, 20X10.