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.

['3071', '355', 'e', '9781', 'R', '6833', 's', '2665', 'L', '9551', 'P', '6101', '2955', '4643', 'O', '3327', '2163', '685', '4277', 'B']
56407

['5215', 'c', '839', 'V']
6054

['j', 'J', 'b', '8341', 'T', '377', 'L', 'O', 'c', 'j', '7291', 'T', 'f', 'E', 'D', '873', '9197', '1877']

27956