Sheffield Corporation incurred the following costs in 2020. Cost of laboratory research aimed at discovery of new knowledge Cost of testing in search for product alternatives Cost of engineering activity required to advance the design of a product to the manufacturing stage $145,000 92,000 240.000 $477,000 Prepare the necessary 2020 journal entry or entries for Sheffield. (Credit account titles are automatically indented when amour entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter for the amounts.) Account Titles and Explanation Debit Credit