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]: ['4811', 'Q', '2289', 'N', 'I', '7681', 'z', '8179', '3359', '5299', 'R', 'z', '8697', '5781', '4803', '2715', '6511', '1371']
[A]: 61496


[Q]: ['M', 'H', 'l', 'Y', '3811', '1953', '5869', 'U']
[A]: 11633


[Q]: ['l', '5397', 'h', 'G', 'W', 'L', 'h', 'L', 'W', 'k', 'W', 'w', '5651', '6527', '7753', '2123']
[A]:
27451