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.

['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']
69093

['7361', '6913', '3605', '2081', '7619']
27579

['9793', 'a', 'h', '4117', '8267', '5981', 'r', 'W', '8557', '8657', 'k', 'F', '4087', 'o', 'H', 'q', 'j', '9047', '8869', 't']

67375