Question:A production worker is paid a salary of $650 per month, plus an extra 5 cents for each unit produced during the month.
  How is this type of labour cost best described?
  A. A variable cost
  B. A step cost
  C. A semi-variable cost
  D. A fixed cost
  The correct answer is: A semi-variable cost
  The salary is part fixed ($650 per month) and part variable (5 cents per unit). Therefore it is a semi-variable cost.