The following information is available from Gray Co.'s accounting records for the year ended December 31, 2019 (amounts in millions): The increase in cash for the year was $49 million. Calculate the amount of cash used to purchase buildings and equipment. Your answer to part a should be considered in your calculation. (Hint: Set up a model of the statement of cash flows to determine the net cash provided [used] by operating and investing activities, and then solve for the missing amounts.) (Enter your answer in millions. (i.e., 5,000,000 should be entered as 5))