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.

Input: Consider Input: ['7411', 'Y', 'x', 'l', '4119', '7241']

Output: 18771


Input: Consider Input: ['3565', 'z', '8811', 'z', 'U', '113', 'I', '1307', '135', 'V', 'P', '5183', '2505', '4863', '1113', 'A', '7575', '827', 'B']

Output: 35997


Input: Consider Input: ['k', 'x', 'A', '1977', 'q', '9921', '3101', 'F', '9571', 'j', 'v', '2295', 'P']


Output: 26865