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.

['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']
33416

['R', '9751', '4367', 'l', 'N', '5125', '8751', '7507', 'y', 'K', '6127']
41628

['o', 'i', 'n', 'N', 'p', '9313', 'S', '4771', 'n', '1165', '9813', '579', 'm', 'T', 'd', 'h', '4277']

29918