The founder of a company issues 100,000 shares of series A stock for his own $250,000 investment. He then goes through three further rounds of investment, as shown below. Round Price/share Number of Shares Series B $2.50 200,000 Series C $2.75 300,000 Series D $2.80 300,000 What is the post-money valuation for the series D funding round? O $2.52 million O $2.77 million O $2.27 million $2.39 million