The tag on the bottle of water in my hotel room encouraged me to "refresh" myself.

Cost to refresh myself = $4.25 per 20oz bottle of water.

In algebra class, we learned that we can determine the cost per gallon, using the following equation:

These are the luxuries we'll forgo as we adapt to $5.00 gasoline.

Cost to refresh myself = $4.25 per 20oz bottle of water.

In algebra class, we learned that we can determine the cost per gallon, using the following equation:

- $4.25 / 20 = "x" / 128 (equation corrected from earlier error!)

These are the luxuries we'll forgo as we adapt to $5.00 gasoline.