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.

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

['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']
10061

['3029', '9831', '8857', 'p', 'K', 'L', '9455']

31172