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.

['o', 'J', 'B', '7765', '7781', '5513', '8721', 'u', '9557', 'C', 'A', '1281', '6565', 'H', '5559', '1695', '7577']
62014

['4607', 'T', 'a', '6077', 'c', '4761']
15445

['S', '2285', '9907', '5909', '8235', '7877', 'S']

34213