Money Credit Banks: task 0001

The sum of the prices of goods sold - 1000 million dollars; the sum of the prices of goods sold on credit - 200 million dollars; the amount of payments for which the due date has come - 300 million dollars; the amount of reciprocal payments - $ 140 million; the average number of revolutions of the monetary units of the same name - 501. Determine the amount of money required for circulation.