Answer
Lower unit cost is $1.058/can, so the best buy is 5 cans.
Work Step by Step
$\frac{2.18}{2 cans}$ = 1.090/can
$\frac{3.57}{3 cans}$ = 1.190/can
$\frac{5.29}{5 cans}$ = 1.058/can
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: 20
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