1. The problem states that 6 kg of biscuits cost 27 dollars. 2. We need to find the cost of 12 kg of biscuits. 3. Calculate the cost per kg by dividing the total cost by the weight: $$\frac{27}{6} = 4.5$$ dollars per kg. 4. To find the cost of 12 kg, multiply the cost per kg by 12: $$4.5 \times 12 = 54$$ dollars. 5. Therefore, the cost of 12 kg of biscuits is 54 dollars.