For each of the following intangible assets, indicate the amount of amortization expense that should be recorded for the year 2018 and the amount of accumulated amortization on the balance sheet as of December 31, 2018 Cost Date of purchase Legal life Useful life Method Patent A $72,000 January 1, 2012 20 years 8 years Straight-line Patent B $55,000 January 1, 2013 20 years 11 years Straight-line