YouTube channels like or "Accounting with Sir Win" often solve de Leon problems on screen. You can watch them solve the 2014 edition exercises for free.
The is particularly sought after because it bridges the gap between traditional cost accounting methods and the specific needs of the Philippine Certified Public Accountant (CPA) licensure exams. Unlike international textbooks (such as Horngren or Drury), the Millan/De Leon approach focuses heavily on solved problems that mimic the style and difficulty of the board exams. cost accounting de leon 2014 book pdf