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]: ['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']
[A]: 28041


[Q]: ['y', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']
[A]: 5708


[Q]: ['b', '4509', '4473', 'v', '1211', 'j', '7023', 'e']
[A]:
17216