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.

['x', '9895', 'r', 'H', 'C']
9895

['211', '7561', '8725', '6139', 'I', '6585', '4231', 't', '2983', 'T', 'S', '9569', 'R', 'b', 'N', 'X', '9009']
55013

['e', '41', '1749', '261']

2051