Tony is mailing packages. Each small package costs him 2.50 to send. Each large package costs him 4.40 . How much will it cost him to send 1 small package and 3 large packages?

Answer 1

The small package will cost Tony 2.50 to send.

The large packages will cost Tony 3 * 4.40 = <<3*4.40=13.20>>13.20 to send.

Thus, it will cost Tony 2.50 + 13.20 = <<2.50+13.20=15.70>>15.70. Answer: \boxed{15.70}.