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]: ['2765', '6767', '7645']
[EX A]: 17177

[EX Q]: ['G', 'o', 'g', 'I', 'S', '9193', 'G', 'C', '2481', '435', 'm', '1005', '5605', '6501', 'D']
[EX A]: 25220

[EX Q]: ['Q', '1941', '303']
[EX A]:
2244