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.

[Q]: ['8591', 'J', 'l', 'l', '7023', 'N', 'n']
[A]: 15614


[Q]: ['R', '9751', '4367', 'l', 'N', '5125', '8751', '7507', 'y', 'K', '6127']
[A]: 41628


[Q]: ['7581', '8627', 'g', '3453', 'n', 'q', '8973', 'F', '8731', '4551', '9479', 'E', '4135', '2243', 'S', '1031', '6067', '4367', 'e']
[A]:
69238