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.

['t', 'Q', '5189', 'g', 'c', '4685', '5309', 'W', '6729', '2843']
24755

['q', '8155', 'L', 'v', '2657', 'X', 'v', '2353', '151', 'R', '967', '4327']
18610

['6491', '6581', '4981']

18053