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]: ['4701', 'b', 'i', 'B', 'z', '7837', 'W']
[A]: 12538


[Q]: ['901', '1939', '7637', '8863', 'X', '5003', '8791', '4757', 'E', '1525', 'y', '9735']
[A]: 49151


[Q]: ['T', '1005', 'm', '2195', 'x', 'S', '6461', '2281', '5405', 'G', '1739']
[A]:
19086