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.
--------
Question: ['W', 'H', 'k', 'L', '2425']

Answer: 2425


Question: ['o', 'J', 'B', '7765', '7781', '5513', '8721', 'u', '9557', 'C', 'A', '1281', '6565', 'H', '5559', '1695', '7577']

Answer: 62014


Question: ['S', 'E', 'n', 'g', '8633', 'H', 'B', '6921', '5407', 'j', '2113', 'u', '7885', '4039', 'w', '1679', '3749', 'u', '5543']

Answer:
45969