The following is the systems cost data bank for a company that constructs office buildings. Perform a simple estimate for a proposed building. with the following parameters and unit costs: Hint: final estimate is seven figures ALWAYS LEARNING Construction Project Management, 4/e Frederick Gould, Nancy Joyce Element Overhead Excavation Foundations Structural frame Exterior walls Interior walls Finishes Roof Electrical Plumbing HVAC Unit cost $2.00 2.00 5.00 6.00 5.00 8.00 6.00 9.00 3.50 4.50 5.50 Basis sf of floor space Footprint of bldg. Footprint of bldg. sf of floor space sf of exterior wall If of interior wall sf of floor space Footprint of bldg. sf of floor space sf of floor space sf of floor space Perform a systems estimate for a proposed building that is 50,000 sf of floor space 25,000 sf of foot print 45,000 If of interior walls 20,000 sf of exterior walls