Janine is considering buying a water filter and a reusable water bottle rather than buying bottled water. She normally drinks 6 bottles a day, each 16.9 ounces. She buys 24-packs of 16.9 ounce bottles for $3.69. Reusable bottle costs about $10. Lasts forever.

A faucet-mounted filter costs about $28 and includes one filter cartridge. Refill filters cost about $33 for a 3-pack. The box says each filter will filter up to 100 gallons (378 liters)
How much money does the filter save her in one year?

Question

Janine is considering buying a water filter and a reusable water bottle rather than buying bottled water. She normally drinks 6 bottles a day, each 16.9 ounces. She buys 24-packs of 16.9 ounce bottles for $3.69. Reusable bottle costs about $10. Lasts forever.

A faucet-mounted filter costs about $28 and includes one filter cartridge. Refill filters cost about $33 for a 3-pack. The box says each filter will filter up to 100 gallons (378 liters)
How much money does the filter save her in one year?