Answer:$4, $8, $12
Explanation: we will first find the sales value of each CD price group
Group CD1= 100x5/(100x5+800x10+10015) = $500/$10,000= 0.05X 100= 5%
Group CD 2 = 10x800/ (100x5+800x10+100x15) =$800/%10,000= 0.8X 100=80%
Group CD 3 = 100x15/(100x5+800x10+100x15)= $1500/ $10,000 = 0.15X 100%=15%
So the costs per CD are:
CD 1= 8000 X.05/100= $4.00
CD 2=8000 x 0.80/800= $8.00
CD 3= 8000x 0.15/100= $12.00