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:
['6051', '5303', '1509', '2797', 'Z', '4777', '721', '8563', 'K', '63', '9115', 'd', '7305', '9743', '7409']

Ex Output:
63356


Ex Input:
['b', 's', 'v', '4757', '9063', 'I', '8397', '7975', 'Q']

Ex Output:
30192


Ex Input:
['f', 'V', 't', '2603', '8217', 'd', '7409', 'C', '4653', '8153', 'S', '4371', 'd', '4981']

Ex Output:

40387