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]: ['Y', 'X', 'd', 'N', '1877', '2865', 'M', '1249', '9385', 'v', 'o', 'P', 'P', '6029']
[EX A]: 21405

[EX Q]: ['z', '3199', 'r', '849', 'C', 'v', '1931', 'M', 'Q', '4531', '579', 'x', '8997', '4663']
[EX A]: 24749

[EX Q]: ['J', '759', 's', '6337', '8467', 'd', '9217', 'L', '6353', 'N', '9573', 'Q', '5481', 'e', 'W', '7903', 'B', 't']
[EX A]:
54090