Abdul is mailing packages. Each small package costs him $2.60 to send. Each large package costs him$3.70 . How much will it cost him to send 1 small package and 5 large packages?

To send 1 small package, it will cost Abdul $2.60.

To send 5 large packages, it will cost him 5 x $3.70 = $18.50.

Therefore, the total cost to send 1 small package and 5 large packages is $2.60 + $18.50 = $21.10.