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]: ['9211', '1889', '7371', '9649', 'b', 'y', 'q', 'a', 'i', '1137', '3291', '8625']
[A]: 41173


[Q]: ['8529', '2657', '1599', 'b', '8187', '7005', '7481']
[A]: 35458


[Q]: ['7569', 'D', '7939', 'S', 'b', 'T', '965']
[A]:
16473