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: ['M', '1589', '8353', 'X', 'P', '3173', 'V', '1335', 'm', 'l', '6421', '4823', 'r', '8941', '4255', '9107', 'z', '2449', '2321', 'l']

Output: 52767


Input: Consider Input: ['j', 'A', 'L', 'i', 'I', '3827', '8245', 'H', 'J', '8117', 'w', '4659', 'Y', 'x', 'K']

Output: 24848


Input: Consider Input: ['655', 'G', 'q', '8497', '2687', 'O', '1241', '8917', '9009', '8747', 'V', 'F', '5165', '4817', 'n', 'S', '3663', '4601']


Output: 57999