Answer
Lower unit cost is $0.449/oz, so the best buy is the 8oz bottle of shampoo.
Work Step by Step
$\frac{3.59}{8 oz}$ = 0.449/oz
$\frac{5.54}{12 oz}$ = 0.462/oz
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 5 - Ratio and Proportion - 5.2 Rates - 5.2 Exercises - Page 344: 18
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