Whenever you buy goods from a shopkeeper, he keeps a part of the price of that goods. That is, he earns well by selling goods, whether it is a shop of anything. Some such story is also with the mobile shopkeeper. When a mobile phone shopkeeper sells a mobile, he gets a limited profit on selling one mobile. You would think that selling a phone would make a lot of profit to the shopkeeper, but it is not so. So today let’s try to know that when a phone is…
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