$($a$)$

$-$ Your answer is correct.

Determine the sales mix percentage based on sales dollars and contribution margin ratio for each division.

Sales Mix Percentage

Tablet division

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MP$3$ Player division

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Contribution Margin Ratio

Tablet division

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MP$3$ Player division

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eTextbook and Media

Attempts: unlimited

$($b$)$

Your answer is incorrect.

Calculate the company's weighted$-$average contribution margin ratio. $($Do not round intermediate calculations; report final answer as a percentage rounded to $2$ decimal places, e$.$g$.15\mathrm{.}26\backslash \%.)$