The following information is available from Gray Co.’s accounting records for the year ended December 31, 2019 (amounts in millions):

Cash dividends declared and paid . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 950
Retirement of bonds payable at maturity . . . . . . . . . . . . . . . . . . . . . . 600
Interest and taxes paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 440
Proceeds of common stock issued . . . . . . . . . . . . . . . . . . . . . . . . . . 1,250
Proceeds from the sale of land . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500
Collections from customers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,940
Cash paid to suppliers and employees . . . . . . . . . . . . . . . . . . . . . . ?
Purchase of buildings and equipment . . . . . . . . . . . . . . . . . . . . . . . ?

Required:

a. The net cash provided by operating activities for Gray Co. for the year ended December 31, 2019, is $3,200 million. Calculate the cash paid to suppliers and employees.

b. The increase in cash for the year was $800 million. Calculate the amount of cash used to purchase buildings and equipment. Your answer to part a should be considered in your calculation. 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.