A car wash wants to reduce the amount of money spent on their water bill each month. The wash uses 225 liters of water per week at a cost of $4500.

i. How much does the car wash pay for 1 liter of water?

ii. Write the cost of 1 liter of water as a fraction of the cost the car wash pays for water each week in its lowest terms..
ii. The car wash has started to harvest water when it rains in barrels that can hold 20 liters of water when at full capacity. If there was a heavy downpour on Saturday filling 5.5 barrels, how much money will the car wash save for that week?