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.

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

['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']
17914

['r', 'k', 'j', 'J']

0