HVAC Ductwork Estimation Sheets -- 3

I have a set of mechanical-ventilation drawings that call for rectangular ductwork in 20-gauge galvanized steel. I need a meticulous quantity survey and cost estimate that I can hand straight to our fabricators and, ultimately, to the client as a firm quotation... (Budget: $8 - $15 AUD, Jobs: AutoCAD, Building Consulting, CAD/CAM, Excel, HVAC, Mechanical Engineering, Project Management, Revit)