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.

['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']
23791

['1319', '6105', '1119', 'c', 'p', '7617', '5113', 'a', '5115', '6731', '6693']
39812

['E', '423', 'Z', 'x', 'c', '2651', 'P', 'M', 'o', '3165', 'f']

6239