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: ['2469', 'c', '6931', 'a', '2167', '9493', '9403', '4123', '4949', 'R', 'V', 'h', '315', 'T', '9411', 'M', '1329', '8217', '6105', 'Y']

Output: 64912


Input: Consider Input: ['4869', 'L']

Output: 4869


Input: Consider Input: ['l', '677', '3333', '2451', 'm', '8477', '7807', 'k', '9483', 'C', 'n', '3145', '6389', 'h', 'W', 'M']


Output: 41762