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.

[EX Q]: ['211', '7561', '8725', '6139', 'I', '6585', '4231', 't', '2983', 'T', 'S', '9569', 'R', 'b', 'N', 'X', '9009']
[EX A]: 55013

[EX Q]: ['2087', '8171', 'c', 'd', 'a', '5621', 'n']
[EX A]: 15879

[EX Q]: ['K', '9121', 'y', '4233', '1513', 'd', '5609', 'C', 'q', 'p', 'S', '627', 'q', 'I']
[EX A]:
21103