Cullumber Publishers sells textbooks to universities across Canada. On July 10, 2021, Cullumber entered into a contract with Hinton University to supply 630 accounting textbooks at a price of $112 per book to be paid on September 25, 2021. The books cost Cullumber $83 each. Cullumber's return policy states that any unsold books can be returned within 90 days of delivery. The books were delivered on August 25, 2021. Cullumber estimates returns at 10% of sales. Hinton returns 21 books on September 15, 2021, and 42 books on September 30, 2021. Determine the transaction price. Transaction price $ On what date should revenue be recognized? Revenue should be recognized on