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]: ['u', 'W', '1561', '9243', '4923', '9385']
[EX A]: 25112

[EX Q]: ['H', 'i', '8085', 'E', 'q']
[EX A]: 8085

[EX Q]: ['b', '621', '9909', 'e', 'Q', 'V', '2615', '2399', 'S', '2079', '8835']
[EX A]:
26458