AutoCAD Civil 3D road cross section subassembly definition

Hello Freelancers, I need help from someone with a good knowledge of AutoCAD Civil 3D subassemblies. I have a road build on low bearing capacity materials, which will need soil stabilization using cement for a thickness of 30 cm. When cross section is in cut, the wearing course (20 cm) will be directly above the stabilized soil. When the cross section is in fill, there will be an embankment with appropriate materials between the wearing course and the stabilized soil. When cross section is in half cut, half fill, the result will be a mix of the 2 conditions (you can see the 3 transversal section types in the attached files). I need help to define the correct subassembly (or the 3 different subassemblies, if more than one is needed) to calculate the bill of quantities for the 3 different materials (stabilized soil, wearing course, embankment). Cut and embankment angle and ditch size are as defined in the attached .dwg. Please let me know if you have any questions. Regards, Francesco