Teacher:In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
Teacher: Now, understand the problem? Solve this instance: ['N', 'R', '6971', '7645', '4799', 'e', '5433', '3865', 'e', '6027', '6759', '173']
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
41672