During 2016, Riverbed Corporation spent $162,720 in research and development costs. As a result, a new product called the New Age Piano was patented. The patent was obtained on October 1, 2016, and had a legal life of 20 years and a useful life of 10 years. Legal costs of $36,720 related to the patent were incurred as of October 1, 2016.

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(a)

all journal entries required in 2016 and 2017 as a result of the transactions above. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter 0 for the amounts.)

Date Account Titles and Explanation Debit Credit

2016 Research and Development Expense 162,720

Cash 162,720

(To record research and development expenses)

2016

Patents 36,720

Cash 36,720

(To record legal expenses)

2016

Amortization Expense 918

Patents 918

(To record amortization expense)

2017

Amortization Expense 3672

Patents 3672

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(b)

On June 1, 2018, Riverbed spent $8,280 to successfully prosecute a patent infringement suit. As a result, the estimate of useful life was extended to 12 years from June 1, 2018. all journal entries required in 2018 and 2019. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter 0 for the amounts.)

Date Account Titles and Explanation Debit Credit

2018

enter an account title to record patents enter a debit amount enter a credit amount

enter an account title to record patents enter a debit amount enter a credit amount

(To record patents)

2018

enter an account title to record amortization expense enter a debit amount enter a credit amount

enter an account title to record amortization expense enter a debit amount enter a credit amount

(To record amortization expense)

2019

enter an account title enter a debit amount enter a credit amount

enter an account title enter a debit amount enter a credit amount