Pat used to work as an aerobics instructor at the local gym earning $35,000 a year. Pat quit that job and started working as a personal trainer. Pat makes $50,000 in total annual revenue. Pat's only out-of-pocket costs are $12,000 per year for rent and utilities, $1,000 per year for advertising and $3,000 per year for equipment.Pat's explicit costs are ________, and Pat's implicit costs are ________.

A. $16,000; $51,000
B. $15,000; $36,000
C. $35,000; $16,000
D. $16,000; $35,000

Answer: D