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]: ['X', 'u', 'B', '269', '9089', 'M', '5175', 'K']
[EX A]: 14533

[EX Q]: ['3215', 'h', '9133', '2771', 'F', 'x', '9033', '709', 'q']
[EX A]: 24861

[EX Q]: ['B', 'U', '5787', 'z', 't', '4621', 'x', 'Q', 'e', '9413', '8299', 'h', 'K', '8205', '7887']
[EX A]:
44212