Khalil is considering buying a water filter and a reusable
water bottle rather than buying bottled water. Will doing so save
her money?
First, determine what information you need to answer this
question, then click here to display that info (along with other
info).
How much water does Khalil drink in a day? He normally drinks
5 bottles a day, each 16.9 ounces.
How much does a bottle of water cost? He buys 24-packs of 16.9
ounce bottles for $2.89.
How much does a reusable water bottle cost? About $10.
How long does a reusable water bottle last? Basically forever
(or until you lose it).
How much does a water filter cost? How much water will they
filter?
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)
A water filter pitcher costs about $22 and includes one filter
cartridge. Refill filters cost about $20 for a 4-pack. The box says
each filter lasts for 40 gallons or 4 months
An under-sink filter costs $130 and includes one filter
cartridge. Refill filters cost about $60 each. The filter lasts for
500 gallons.
Which option is cheapest over one year (365 days)?
The cheapest option saves him ___ over a year.