A shop keeper buys 20 kg of sugar at birr y /kg he sells 16 kgs at birr y+3/4 per kg and the rest at birr y+1 per kg what is his profit?
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Answer:
total cost: 20kg at y bir/kg = 20y bir.
revenue:16 kg at (y+3/4) bir +4 kg at y+1 bir/kg = (16y +12) bir+(4y+4) bir = (20y+16) bir
revenue less cost : (20y+16) bir - 20y bir = 16 bir.
The shopkeepers profit is 16 bir.
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