From the tweet, wanasema a coffee, njugu, mandazi hawker earns 5k per day.
Let me breakdown the mathematics
A tea urn carries 9.5L that's 9500ml
A coffee cup of 10 bob is 50ml and 100ml is 20 bob
Let say they sell A half of 9500ml for 50ml and the other half to 100ml. Half of the tea urn is...