It is BAS nd PAYG payment time due on 28th of February and sales go dead for a few weeks after that.  Happens everytime.  Normal average over $350 per day, for March so far I have $350 in total and half of that was on Sunday.  

Just have to hold your breath and have faith that they buyers will return and hopefully with a vengeance.

In the meantime, catch up on bookeeeping, rearrange stock, do a stocktake etc etc.