#### Answer

$72$

#### Work Step by Step

Cost per bag = $ 18$
Total number of bags required= $18\times $4 = $72 $

Published by
Brooks Cole

ISBN 10:
1439047901

ISBN 13:
978-1-43904-790-3

$72$

Cost per bag = $ 18$
Total number of bags required= $18\times $4 = $72 $

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