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]: ['773', 'e', '4451', 'S', 'I', 'r', 'e', 'V', 'Q', 'g', 'J', 'L', '7655', 'O']
[EX A]: 12879

[EX Q]: ['h', '2295', '2913', 'I', '5273', 'L', '2739', '8227', '6537', 'e', '6491', '5463', 'i', '4337', '537']
[EX A]: 44812

[EX Q]: ['A', 'k', '4737', '2791', 'w', '4477', '4941']
[EX A]:
16946