Text this: STRIPPING RATIO OPTIMIZATION IN COAL MINING DESIGN USING REAL OPTION VALUATION METHOD

  _____    _    _    _    _     _____     ______  
 |__  //  | || | || | \  / ||  |  ___||  /_____// 
   / //   | || | || |  \/  ||  | ||__    `____ `  
  / //__  | \\_/ || | .  . ||  | ||__    /___//   
 /_____||  \____//  |_|\/|_||  |_____||  `__ `    
 `-----`    `---`   `-`  `-`   `-----`   /_//     
                                         `-`