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.

['d', '4553']
4553

['z', '3199', 'r', '849', 'C', 'v', '1931', 'M', 'Q', '4531', '579', 'x', '8997', '4663']
24749

['5267', 't', '261', '4437', '831', '8049', '3637', '7593', '2791', 'L']

32866