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.

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

[EX Q]: ['z', 'T', 'Y', 's', 'j', '585', '7833', '2601', '8057', 'S', '7037', '5799', '4477', '5377', '6301', 'P', 'm', '9431', 'f']
[EX A]: 57498

[EX Q]: ['V', 'C', 'a', '9759', '3709', '8347', '9519', 'Z']
[EX A]:
31334