2.1
Unit Prices
53
Analyzing a Unit Price
Dairy farmers are paid for every 100 pounds of milk produced.
a. In 2010, how much did a dairy farmer earn per gallon of milk produced?
(A gallon of whole milk weighs about 8.6 pounds.)
b. In 2010, the price of a gallon of milk was about $3.25. What percent of the
price did the dairy farmer earn?
Prices Paid to Dairy Farmers for 100 Pounds of Milk
20.0
17.0
16.0
15.0
14.0
13.0
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
0.0
1993
12.0
1992
An old saying is “A pint is
a pound the world around.”
The actual weight of a
pint of water is about
1.04 pounds. There are
8 pints in a gallon, so a
gallon of water weighs
about 8.32 pounds.
18.0
1991
Study Tip
Dollars per 100 pounds
19.0
Year
SOLUTION
a. In 2010, a dairy farmer earned about $16.50 for every 100 pounds of
milk produced.
$16.50
100 lb
( )
$16.50 8.6 lb
100 lb 1 gal
$1.419
gal
Unit price = — = — — = —
A dairy farmer earned about $1.42 per gallon of milk produced.
b. Amount earned by farmer
Price per gallon
For milk to be labeled “organic,”
the cows must meet four criteria.
•
•
•
•
Not treated with growth
hormone
Not given antibiotics while
in a herd
Not fed feed treated with
pesticides
Must have access to pasture
$1.42
$3.25
— ≈ 0.44
The dairy farmer earned about 44% of the price.
Checkpoint
Help at
In 2010, a dairy farmer earned about $25 for every 100 pounds of milk produced
organically. The price of a gallon of organic milk was about $5.25.
c. How much did a dairy farmer earn for a gallon of organic milk in 2010?
d. What percent of the price did the dairy farmer earn?
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