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]: ['Z', 'w', 'M', '2233', '5275', '5277', 's', '971', '7085', '6259', 'V', 'E', '4923', '7365', 'c', 'd', 'c', 'U', 'P']
[EX A]: 39388

[EX Q]: ['N', 'z', 'O', '6567', 'F', 'E', 'u', 'Z', '7949', 'V', 'M', 'q', '7565', '951', 'E', '2637', 'Z', 'h']
[EX A]:
25669