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]: ['A', '6323', 'T', 'H', 'M', 'S', 'D', 'r', 'v', '8169', '7649', '5149', 'x', '6275']
[EX A]: 33565

[EX Q]: ['A', '9775', '5867', 'n', '1329', '5973']
[EX A]: 22944

[EX Q]: ['e', '7955', '3997']
[EX A]:
11952