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.

['w', '1335', 'G', 'h', '6729', '1999', 'u', 'I', 'r', 'm', '4757', 'W', '3715', '701', '1999']
21235

['v', '4119', 'I', '475', 'd', 'L', '909', 'F', 'V', '775', 'k', 'A', '9411', '8383', 'W', '1521', 'z', 'j', '7057', 'I']
32650

['309', 'A', '6575', 'z', 'L', 'n', '5871']

12755