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 4750ml
Number of cups of 50ml in 4750ml is 95. At a cost of 10 bob each translate to 950
Number of cups of 100ml in 4750ml is 47. At a cost of 20 bob each translate to 940
The total sales turnover for coffee is 1890
Their other products is mandazi and njugu
One mandazi is 10 bob and one njugu is 20bob
Let's say they make total sales of 5000, let minus the coffee Sales of 1890. We have 3110
Let divide 3110 into 2 to represent mandazi and njugu which brings 1555 each.
To achieve sales of 1555, they need to sell 155 mandazis of 10 bob and 77 njugus of 20 bob
So for them to achieve total sales of 5000, They need to sell 142 coffee cups, 155 mandazis and 77 packs of njugu
Numbers don't lie. Hii
ni story ya jaba