Knowledge Check 01 Which of the following are part of the four-level hierarchy used in activity based costing systems? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.) Batch level activities Company-wide activities Facility level activities Overhead activities Product level activities Unit-level activities