Candalibra Company incurred the following costs during the year ended December 31, 2018: Laboratory research aimed at discovery of new knowledge $300,000 Costs of testing prototype and design modifications (economic viability not achieved) 55,000 Quality control during commercial production, including routine testing of products 210,000 Construction of research facilities having an estimated useful tife of 12 years but no alternative future use 440,000 What is the total amount to be classified and expensed as research and development in 2018 under U.S. GAAP