Give the step-by-step reasoning process and then the final answer. Polly the parakeet tweets all day long. When she is happy, she tweets 18 times per minute. When she is hungry, she tweets 4 times per minute. And when she watches herself in the mirror, she tweets 45 times per minute. During a time period where she is happy for 20 minutes, hungry for 20 minutes, and watches her reflection for 20 minutes, what is the total number of times she will tweet?
In 20 minutes, she happy tweets for 20 * 18 = 360 times. In 20 minutes, she hungry - tweets for 20 * 4 = 80 times. In 20 minutes, she tweets at her reflection 20 * 45 = 900 times. Altogether, she tweets 360 + 80 + 900 = 1340 times.
The final answer: 1340.