Board Thread:Questions and Answers/@comment-173.73.139.128-20130404005602/@comment-173.86.1.5-20130404171635

in the intake slot, the one going in, put what you want as payment.

in the other put what your selling.

pop a chest next to it with the things you sell, and it will fill it with the money and take the other one out and give it to the player who bought it.