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.

['2013', 'S', 's', '9353', 'b', 'u', '6687', '5429', '3545', '7269']
34296

['c', 'd']
0

['2273', '7389', '3055', '8479', 'w', '9091', 'v', '5055', 'i', '2451', '2327', 'R', 'D', 'M', 's', 'B', '6809']

46929