In the current year C purchased new office equipment costing $20,000. Later in the same year he sold some office equipment for $30,000 that originally cost $100,000. At the beginning of the current year the UCC of the office equipment class was $40,000. What is the maximum CCA deduction for the office equipment class that C can claim in the current year? Note: Do not place a minus sign in front of the amount. $ 4000 $