... save your energy. Only the first 2 hours use energy for heating. After the first 2 hours mainly use gas, little ... 20,250RMB2Carbon Black10T×35%×520RMB=1,820RMB3Steel Wire10T×13%×2200RMB=2,860RMB4Gross Profit24,930RMB5Daily Net Profit24,930RMB-15,920RMB=9,010RMB6Monthly ... Net Profit9,010RMB×25=225,250RMB7Yearly Net Profit225,250RMB×10=2,252,500RMBVI. PRODUCT SHOW waste tires oil extraction machine