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: ['1693', '9237', '7591', '1593', 'R', '6295', '9379']

Output: 35788


Input: Consider Input: ['D', 'm', 'P', '2433', '6731']

Output: 9164


Input: Consider Input: ['9961', '2261', 'V', '5189', '1449', '983', '9033', '5387', 'c', '151', '1849', '1953', 'u', 'J', 'D', '9479', '9449']


Output: 57144