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.

['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']
28991

['4463', '489']
4952

['r', 'l', '3757', '3815', 'a', 'N', 'c', 'T', '3297', '6895', 'X', '5747', '4695', '3527', 'Y', '1225', '2325']

35283