ABC firm purchased 100 food processors in 2019. By the end of 2019, there are 50 of them not sold yet. The purchased price of the food processors is $120. On Dec. 31 2019, this type of food processor only sells $100. What should the accounts do with the price change? Select one or more: a. Credit 2,000 revenue. b. Credit 1,000 revenue. X c. Debit 2,000 cost of goods sold. d. Debit 1,000 cost of goods sold