An event that does not result in the recording of a liability is
a. the sale of an automobile for cash by an automobile manufacturer that provides free maintenance for 2 years.
b. the sale of major league baseball season tickets during the month of january.
c. the declaration of cash dividends to be paid in 4 weeks.
d. the purchase of land for common stock when the land is to be stated at more than the par value of the common stock.

Atennis club charges a monthly membership fee of $150 and charges it members $10 per hour to use a court. there's also $500 fee to become a member. stella joined the tennis club last spring, and she has been a member for 5 months. she has been playing 10 hours of tennis each month. stella values an hour of her time at $20. during a boring afternoon meeting, stella thinks about reserving a court to work on her serve for an hour tonight. what's stella's opportunity cost of working on her serve for an hour?