4. On July 1, 2016, Marlin Company purchased the copyright to Bodine Educational Tutorials for $81,000. It is estimated that the copyright will have a useful life of 5 years with an estimated residual value of $6,000. The amount of Amortisation Expense recognised to 31 December 2016 would be: a. $16,200. b. $7,500. c. $15,000. d. $8,100. e. None of the above is correct