Jenny Smith, the owner of Blasto Walkmans, analyzed the high warranty costs the company was incurring. She determined one of the major defects was the result of a low-priced battery device provided by a supplier.

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A. How can managerial accounting be used to assist Jenny in determining whether she should install a more expensive, higher-quality battery device?

B. How could Jenny use value chain analysis to provide better information in making this decision?