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]: ['O', 'j', 'Z', 'u', '7427', '4225', '3139', '9993', '9945', '3639', 'h', 'j', 'f', '6511', 'e', '4607', '2741', '4743']
[EX A]: 56970

[EX Q]: ['2237', '2597', '2593', 'Y', '5345', 'g', 'l', 'I', 'p', 'u', 'L', 'T', '617', '9759', 'b', 'w', '7097', '9863']
[EX A]: 40108

[EX Q]: ['f', 'E', 'z', 'E', '5893', 'n', 'a', '6657', '6411', 'P', 'S', '3961', 'B', 'V']
[EX A]:
22922