Well assuming that we denote cheeseburgers by cb. cb = 2.25 dollars so four cb would be for 9 $.
Similarly we denote french fries by ff. ff = 1.25 dollars so three ff would be for 3.75 $.
Similarly we denote drinks by d. d = 4 dollars so four d would be for 16.00 $.
So in total the expression would be 4*cb + 4*d + 3*ff which equates to 28.75$