Final answer:
The unit price of a half liter bottle is $6 per liter, and the unit price of a one liter bottle is $5 per liter.
Step-by-step explanation:
To find the unit price of a half liter bottle and a one liter bottle, we need to divide the cost by the volume. For the half liter bottle, the cost is $3 and the volume is 0.5 liters. The unit price would be $3 divided by 0.5 liters, which is $6 per liter.
For the one liter bottle, the cost is $5 and the volume is 1 liter. The unit price would be $5 divided by 1 liter, which is also $5 per liter.
So, the unit price of the half liter bottle is $6 per liter and the unit price of the one liter bottle is $5 per liter.