Please answer the following question by reasoning step-by-step.
Ursula earns $8.50 an hour working in a restaurant. She works 8 hours a day. If she works 20 days a month, determine her annual salary.

16320
Ursula earns 8 x $8.

50 = $68 a day.

In a month, she earns 20 x $68 = $1360.

Therefore, Ursula's annual salary is 12 x $1360 = $16,320.

.

The answer: 16320