Final answer:
The property manager's annual salary is $16,800.
Step-by-step explanation:
To calculate the property manager's annual salary, we need to find 12% of the property's annual gross income. The annual gross income is given as $140,000, so we can find the annual salary by multiplying $140,000 by 12% (or 0.12).
Annual salary = $140,000 * 0.12 = $16,800.
Therefore, the property manager's annual salary is $16,800.