my friends and I also sold them for school bazaar in NP. those
simple bread and icecream. we initially sell for $1.80 (or 4 for
$6).
then left about 9 pieces, sell 3 for $1. 
let me reveal something...
the cost price? it cost bout 70cents. so margin quite good.
students like it alot. but my mom dont understand whats happening..
i bring some home to cook, end up drinking hot choc.