The essential oil is automatically rung in by your selecting it from the list.

That's all the items presented on the counter. We ask the customer if he is a member of the co-op, because we want to attribute the sales to his member number. The answer is indistinct, and we assume he is not a member.

We therefore press the "non member" key to set off the alarm.

Just joking! In our membership database, we set a number to be "non member" and now we attribute this sales to that number.