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.

['Q', '8841', 'H', 'v', '2435', '8221', '807', 'P', '2247', 'M', '4609', '5657', 'k', '2807', 'j', '8451']
44075

['n', '6729', 'p', 'D', 'o', '1213', 'e', '6951', '2341', '9997', 'e', 'M', 'x', 'R']
27231

['G', '5491', 'g', 'i', 'Z', '8045', '8825']

22361