Trecek Corporation incurs research and development costs of $650,000 in 2023, 30 percent of which relate to development activities subsequent to IAS 36 criteria having been met that indicate an intangible asset has been created. The newly developed product is brought to market in January 2024 and is expected to generate sales revenue for 10 years.

a. Determine the appropriate accounting for research and development costs for the years ending December 31, 2023, and December 31, 2024, under (1) U.S. GAAP and (2) IFRS. 

b. Prepare the entry(ies) that Trecek would make on the December 31, 2023, and December 31, 2024, conversion worksheets to convert U.S. GAAP balances to IFRS.