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.

['2039', '1679', '9675', 'S', 'J', '2069', 'r', 'e']
15462

['7335', '813', '6461', '8903', '3709', 'V', 'G', 'I', 'P', 'p', 's', 'v', 'R', '4697', '4263', '9897']
46078

['6461', '7395', '5099', '1121', 'C', '9193', 'i', '9919', '1879', '6329', '8789']

56185