According to the revenue recognition principle, revenues should be recognized when or as the company performs acts promised to the customer. For many businesses, this condition is met at the point of delivery of goods or services. The following transactions occurred in September:

Required:

For each of the transactions, if revenue is to be recognized in September, indicate the amount

$\backslash$table$[[$Activity$,$Amount$],[\backslash$table$[[$a$.$ A customer paid for and downloaded song files from Apple's iTunes store for $$35$