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: ['6055', 'v', '9455', 'A', '6817', 'D', '9339', 't', 'K', '1993']

Answer: 33659


Question: ['7335', '813', '6461', '8903', '3709', 'V', 'G', 'I', 'P', 'p', 's', 'v', 'R', '4697', '4263', '9897']

Answer: 46078


Question: ['3919', '807']

Answer:
4726