At the end of 2007, Lehnhoff Inc. had $175 million in cash. During 2008, the following events occurred: Cash flow from Lehnhoff's operating activities totaled $325 million. Lehnhoff issued $500 million in common stock. Lehnhoff's notes payable increased by $150 million. Lehnhoff purchased fixed assets totaling $600 million. How much cash did Lehnhoff Inc. have at the end of 2008? Select one: O a. $850 million O b. $ 500 million . $ 400 million Od $ 200 million O e. $ 550 million Clear my choice