Assuming the cost of the tablet, till last November, was ~4.2 M$ they "pre-sold" 12K units and raised funding ~2.8 M$. The loss at that point was ~1.4 M$ but meanwhile they have finished both sw and hw designs.

If they go for a refund that will cost them 2.8 M$, and they have to write off hw designs cost as a loss too.

On the other hand if they produce the tablets they have to pay manufacturing costs only which I think(?) it must be less than $220 per device at the moment, plus hw support costs.