1st, direct cost analysis: monolith pulverized coal ash porous brick weight =0.24×0.115×0.09×1250kg/m3=3.1kg monolith pulverized coal ash sign brick weight =0.24×0.115×0.053×1350kg/m3=1.97kg monolith pulverized coal ash floor tile weight =0.20×0.1×0.06×1600kg/m3=1.92kg 325# cement: 230 Yuan/ton sands: 22.5 Yuan/ton gravel: 22.5 Yuan/ton pulverized coal ash: 8 Yuan/ton monolith pulverized coal ash porous brick cost =3.1/1000× (0.12×230+0.14×22.5+0.44×22.5+0.3×8) =0.13 Yuan monolith pulverized coal ash sign brick cost =1.97/1000× (0.10×230+0.16×22.5+0.44×22.5+0.3×8) =0.076 Yuan monolith pulverized coal ash floor tile cost =1.92/1000× (0.10×230+0.16×22.5+0.54×22.5+0.2×8) =0.079 Yuan

2nd, overhead costs: electrical bill: 50KW×300×16h×1 Yuan /kw · h * 0.7 = 168,000 Yuan water fee: 3000 ton/year ×2.00 Yuan/ton = 0.6 Yuan the mold damages the consumption: 50,000 Yuan wages: 25 person of ×1000 Yuan/person of/month * in December = 300,000 Yuan depreciation: 432,000 Yuan /10 year = 43,200 Yuan/year other expenses (service, labor insurance, examination, work, labor membership dues, duty cultivate, vehicle ship) to estimate: 50,000 Yuan equals the overhead costs: 617,200 Yuan

3, uses the production line to produce product monolith total cost the pulverized coal ash porous brick: 0.13+61.72×10000÷ (10×30×16×3600×20/15) =0.157 Yuan pulverized coal ash sign brick: 0.076+61.72×10000÷ (10×30×16×3600×40/15) =0.089 Yuan pulverized coal ash floor tile: 0.079+61.72×10000÷ (10×30×16×3600×20/15) =0.106 Yuan