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.

['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']
19001

['1815', 'U', '869', 's', '1847', 'C', '2711', 'S', 'i', '7949', '4477', '5093', 'D', '8661', '3835', '4087', '73', 'V', '3149', 's']
44566

['s', 'q', '3937', 'Q', '7905', 'd', 'e', 'A', '8427', '7957', '2363', 'l', 'b', '9427', '8833']

48849