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Change in Contribution Margin that $17,500$ additional Sun Sound and $19,100$ additional Ear Bling headphones could be sold. The operating income by unit of product is as follows:

$\backslash$table$[[,\backslash$table$[[$Sun Sound$],[$Headphones$]],\backslash$table$[[$Ear Bling$],[$Headphones$]]],[$Sales price,$$40\mathrm{.}70,$$$63\mathrm{.}50$