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]: ['2975', '33', '2845', '4695', 'j', '607', 'e', 'z', '6339', '1899', 'q', 'O']
[EX A]: 19393

[EX Q]: ['a', 'q', '4085', '6327', '6869', 'Z', 't', '7057', '1965', 'p', 'o']
[EX A]: 26303

[EX Q]: ['D', '9171', 'A', 'u', '3937', 'G', 'a', '8677', 'I', 'H', 'u']
[EX A]:
21785