What is the cut/fill at the grid intersection highlighted on the attached drawing excerpt? Required information is: Existing topsoil depth is 270 mm New parking structure is 420 mm deep New landscaping is 100 mm deep New sidewalk is 150 mm deep New Slab on Grade is 400 mm deep Area bound by the gridlines is 81 sq. m. All new structures include base and sub-base, as required. The answer is to be in the format