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

['1709', 'S', 'w', '7725', 'Z', '7755', '8081', '897', 'N', '4449', 'F', 'F', 'M', 'y', 'B', 'h', 's', 'l', 's', '415']
31031

['W', '5139', '4907', 'H', 's']

10046