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: ['5199', 'h', 'T', 'T', 'l', '1661', 'p']

Output: 6860


Input: Consider Input: ['O', 'j', 'Z', 'u', '7427', '4225', '3139', '9993', '9945', '3639', 'h', 'j', 'f', '6511', 'e', '4607', '2741', '4743']

Output: 56970


Input: Consider Input: ['7321', '8829']


Output: 16150