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.

['W', 'c', 'P', '425', '4133', 's', '1831', '883', '2531', '681', 'U', 'B', 'H', '237', '4245']
14966

['I', '1941', '2423', '3381', 'J', '6589', 'h', 'D']
14334

['7943', '9915', '7217', 'Z', '2893', 'R', '2879', '5431', '7717', 'T', '2865', '2145', '6425', '7125']

62555