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]: ['X', '989', 'U', '9551', '6385', 'Y', '1433', 'J', '1833', '685', 'u']
[A]: 20876


[Q]: ['b', 'O', '7023', 'q', '2667', '681', 'C', '5707', '7125', 'q', 'Q', '1375', '8869', '6709']
[A]: 40156


[Q]: ['Q', '8037', 'r', 'J', 'N', 'Z', 'z', '1189', 'H', '6555', '61', 'k', 'X', 'd', 'W', '6483', 'J', '8815', 'S', '1731']
[A]:
32871