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.

['l', 'V']
0

['6051', '5303', '1509', '2797', 'Z', '4777', '721', '8563', 'K', '63', '9115', 'd', '7305', '9743', '7409']
63356

['n', '5011', '9767', '3351', 'N']

18129