Answer:
WeDeliver = 640£
GoParcels=  400£
Step-by-step explanation:
The cost for WeDeliver service is calculated based on volume. The parcel is cuboid, so the volume will be:
length x wide x height = 20cm * 10cm  * 40cm= 800[tex]cm^{3}[/tex]
The cost is £0.80 every [tex]cm^{3}[/tex], then the total cost will be: 800[tex]cm^{3}[/tex] * £0.80/[tex]cm^{3}[/tex] = 640£
The cost for GoParcels service is calculated based on the area of the parcel. Using the cuboid area formula, the area of the parcel will be:
2(length x wide) + 2(length x height) + 2(wide x height)=
2(20cm*10cm) + 2(10cm * 40cm) + 2(10cm*40cm)= 2000 c[tex]cm^{2}[/tex]
The cost is  £0.02 every cm^3, then the total cost will be:2000[tex]cm^{2}[/tex] *  £0.02/[tex]cm^{2}[/tex] = 400£
