1. They don't make the food, they only transport it. Payment of taxes or GST on food delivered is between the food maker and the food receiver – dabbawala is not involved.

2. Article claims roughly 200,000 deliveries per day.

3a. Cost of each delivery is Rs. 800 per month / 24 working days = approx Rs. 33 (or less than half a dollar) per delivery. Normally the delivery involves a pick up as well (previous day's container is picked up along with today's delivery).

3b. Value of food content is irrelevant – it can be super expensive or dirt cheap, dabbawalas only care that it is packed in certain types of containers.