The break-even sales volume in gallons for I scream ice-cream is calculated as follows:
![\begin{tabular} {|p{2cm}|c|c|c|} & Rocky Road & Peanut Butter & Fruity Tooty\\[2ex] Sales price per gallon&\$5.25&\$5.75&\$8.25\\ Variable cost per gallon&\$3.50&\$5.00&\$2.25\\ Contribution margin/unit&\$1.75&\$0.75&\$6.00\\ Sales mix&2&2&1\\ Contribution margin&3.50&1.50&6.00 \end{tabular}](https://img.qammunity.org/2018/formulas/mathematics/college/16ijdjubgnmbzdrp4h7rjlmowak2l4099t.png)
The total sales mix is 5 and the total contribution margin is 11. This gives the weighted average contribution margin is given by 11 / 5 = 2.2
The break-even sales volume is given by (fixed cost + operating income) divided by the weighted average contribution margin.
This is given by ($27,500 + 0) / 2.2 = $12,500