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]: ['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']
[EX A]: 19001

[EX Q]: ['Q', '8841', 'H', 'v', '2435', '8221', '807', 'P', '2247', 'M', '4609', '5657', 'k', '2807', 'j', '8451']
[EX A]: 44075

[EX Q]: ['4699', 'U', '2399', 'z', 'y', '7107', 'i', 'h', 'O', 'u', 'k', '6831', '8585', '8945', 'u', 'B', '6073']
[EX A]:
44639