i think less than $15 per pack 
i operate checkout counters before..
you'll be shocked by the type of people who buy condom 
and got once a man was busily receiving his money change,
that he forgot the two packs of condom on my counter,
and he walk off
then few seconds later
he walk back to my counter and told his friend ( a man )
that he was
"busy receiving change that he forgot the thing", and his friend
LOL at him
i nearly LOL too but i can't laugh and i try to control my laughter
even when i'm serving the next few customers
maybe it wasn't funny but the way he mention about it is LOL