The Fort restaurant owner buys a buffalo steak for $7. The chef is paid $2 to cook the steak. A wait staff person is paid $1 to deliver the steak to the customer. The customer is charged $18 for the steak and pays for it in cash. The customer also tips the wait staff person $3. According to U.S. GAAP, what amount of revenue should the Fort report in connection with this series of events? Note: watch the distractors. O $18 $8 $13 $10