Packing chocolate

This task is about working out volume.
chocolate box packing  
 
Chocolate bars are packed in a box as shown.

Question 2Change answer

a)  How many bars are in a full box?

Question 2Change answer

b)  The measurements of the box are shown on the diagram.  
     i)  What is the volume of the box?      cm3
     ii) What is the volume of one bar of chocolate?      cm3