Compute contribution margin per machine hour for $($a$)$ acoustic guitars and $($b$)$ electric guitars.

Determine the most profitable sales mix for the company.

Compute the month's total contribution margin for the most profitable sales mix.

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Compute contribution margin per machine hour for $($a$)$ acoustic guitars and $($b$)$ electric guitars.

$\backslash$table$[[$Selling price per unit,,Acoustic,$],[,,,],[$Contribution margin per unit,,,$],[,,,],[$Contribution margin per machine hour,,,$]]$