A quarter is worth $0.25 A dime is worth $0.10 and a nickel is worth $0.05 He got $0.01 back
to see how much he paid for we add up the money so 0.25 + 0.10 + 0.05 = 0.40 Then he received one penny back so 0.40 - 0.01 = 0.39 The candy bar cost $0.39 or 39¢