Answer:
The contribution margin ratio per composite unit for Youth:Adult:Recreational models is 25%:45%:30% .
Explanation:
The given sales mix ratio is 5:9:6 for Youth:Adult:Recreational cycle models.
The first step would be to calculate the combined contribution margin per unit =
$105 x 5 + $450 x 9 x $500 x 6 / 20
(HERE 20 IS THE TOTAL NUMBER OF UNITS)
= 525 + 4050 + 3000 / 20
= 7575 / 20
= 378.75
Now calculating the individual contribution unit of youth, adult and recreational from the total combined units -
Youth = 378.75 x 5 / 20
= 94.6875
Adult = 378.75 x 9 /20
= 170.4375
Recreational = 378.75 x 6 /20
= 113.625
Now calculating what percentage they form -
Youth = 94.6875 / 378.75 x 100
= 25%
Adult = 170.4375 / 378.75 x 100
= 45%
Recreational = 113.625 / 378.75 x 100
= 30%