If 500 is just an average and 1000 is the next band up. I would...

If 500 is just an average and 1000 is the next band up. I would calculate (conjecture):
Stage 1 - 500 units per day
Stage 2 - 500 units per day
Stage 3 - 500 units per day

365 days in a year x 1500 x $29 = $16 million. That's chemist warehouse online. What about Woolies and Coles online. It is really that good. Also that's an average day as all holidays in China are over. On a holiday / festival day I'm sure demand will be even higher. It's good for long term. Don't be lazy prosperity do some math.