6. At the end of the calendar year, a firm has total financial assets amounting to $3.78 billion, while its total liabilities are $3.63 billion. What is this firm's net financial wealth? If the firm saved $50 million dollars over the previous year, representing the amount by which its financial assets rose relative to its liabilities, and it had begun the year with $3.63 billion in total financial assets, how much did it earn on its previously accumulated assets?