2.1 Unit Prices

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• Math Help

A unit price is sometimes called a unit cost. In either case, remember that it is customary to write the dollar amount in the numerator.

In Example 3, be sure to notice two things.

1. To compare unit prices, you should write each unit price using the same units.
2. To convert dollars per gallon to dollars per fluid ounce, multiply by a conversion factor.

• Consumer Suggestion

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If you'd like to donate or volunteer to help after a disaster strikes, visit the American Red Cross.

• Checkpoint Solution

Each of the detergents in Example 3 recommends 2 fluid ounces for a load of wash. The cost per load is as follows.

For the homemade laundry soap, use 1 gallon = 16 cups to figure out the amount of soap produced in one batch.

Assuming there is no cost for water, the cost of the recipe is

Each load of laundry needs cup of soap.

So, the cost per load is roughly \$0.01.

The comparison is amazing, isn't it?

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