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


[Q]: ['Q', '8317', '8989']
[A]: 17306


[Q]: ['q', '6581', 'f', 'R', 'h', '849', '5591', 'W', 'Y', '253', 'c', 'q', 'f', 'V']
[A]:
13274