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.

Ex Input:
['M', '5201', '2787', 'z', '9465', 'X', 'X', '4017', '8305', 'y', '6897', 'y', '6045', '9863', 's', 'd', '3611', 'l', 'd']

Ex Output:
56191


Ex Input:
['g', 'h', '9141', '7825', 'a', 'u', '2389', 'r', '9739', '8337', 'Z', 'Z', '6717']

Ex Output:
44148


Ex Input:
['j', '1149', 't', '6389', 'n', '9745', '8701', '6277', '8901', 'd', '6769', '3511', '4647', '541', '5285', '3523', 'Y', '3683', '9473', 'B']

Ex Output:

78594