instruction:
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:
['1709', 'S', 'w', '7725', 'Z', '7755', '8081', '897', 'N', '4449', 'F', 'F', 'M', 'y', 'B', 'h', 's', 'l', 's', '415']
answer:
31031


question:
['7335', '813', '6461', '8903', '3709', 'V', 'G', 'I', 'P', 'p', 's', 'v', 'R', '4697', '4263', '9897']
answer:
46078


question:
['V', 'I', 'i', 's', '3229', 'r', 'j', 'T', '4263', '7627', '5459', '8717', 'M', 'l', 'r', '867', '6901', '5951', '1893', '6607']
answer:

51514