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.

[Q]: ['S', 'W', '2171', '6405', 'h', 'C', '1597', '7109', 'Q', 'p', '2747', 't', 'J', 'q', '1883', 'v', 'O']
[A]: 21912


[Q]: ['t', 'Q', '5189', 'g', 'c', '4685', '5309', 'W', '6729', '2843']
[A]: 24755


[Q]: ['1743', '4389', 'r', '3079', '3381', '9125', '1647', '4547', '429', 'v', 'X', '8775', 'c']
[A]:
37115