human
At the supermarket, the price paid for oranges is proportional to the mass purchased. Annie paid $6 for 2 kg of oranges. How much will Annie pay for 12 kg of oranges?
assistant
How much does 1 kg of oranges cost? ** The price of 1 kg of oranges is $6 / 2 kg = $<<6/2=3>>3/kg
How much will Ali pay for 12 kg of oranges? ** So Ali will pay 12 kg * $3/kg = $<<12*3=36>>36 for 12 kg of oranges.
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