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.

['5199', 'h', 'T', 'T', 'l', '1661', 'p']
6860

['h', '2295', '2913', 'I', '5273', 'L', '2739', '8227', '6537', 'e', '6491', '5463', 'i', '4337', '537']
44812

['B', 'a', '9283', 'T', '6397']

15680