A patent was acquired by Sheridan Corporation on January 1, 2017, at a cost of $77,600. The useful life of the patent was estimated to be 10 years. At the beginning of 2020, Sheridan spent $14.980 in successfully defending an infringement of the patent. At the beginning of 2021, Sheridan purchased a patent for $24,150 that was expected to prolong the life of its original patent for 5 additional years. Calculate the amortization expense for 2017 Amortization Expense $ e Textbook and Media Calculate the balance in the Patent account at the beginning of 2020, immediately after the infringement suit Balance in the Patent account $ Calculate the amortization expense for 2020. Amortization expense $ e Textbook and Media Calculate the balance in the Patent account at the beginning of 2021, after purchase of the additional patent. Balance in the Patent account $ e Textbook and Media Calculate the amortization expense for 2021. Amortization expense A e Textbook and Media