Detailed Instructions: 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.
Problem:['H', 'U', '5379', 'd', '2373', '6631', 'L', '3395', '3137', '5453', 'Q', 'w', 'y', '8273', '9763', 'e']
Solution:
44404