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.
--------
Question: ['6367', '9923', '9141']

Answer: 25431


Question: ['7215', 'd', 'q', 'k', '9301', 'P', 'x', 'C', 'g', 'e', 'o', '2769', '6993', '9769', 'v', '9007', '4131', '8627', 'q']

Answer: 57812


Question: ['P', '4461', 'J', '6115', '1335', 'u', '499', '3327', '225', '49', '7919', 'Q', 'F', 'g', '1483', '6855', '6213', 'T', '2269']

Answer:
40750