Arrange the digits 9,5,89,5,89, comma, 5, comma, 8 and 999 to create the greatest possible four-digit number.

How much money does ron have left each month after his fixed expenses? ron graduated from college five years ago. he recently bought a house, but shares it with a housemate who pays him $800 a month for rent and utilities. ron is putting a budget worksheet together so he will have a better idea of where his money is going and where he can save. enlarge