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:
['4241', 'E', '1807', '2877', '5125', '7625', 'S', '401', '5081', 'u', 'R', 'F']
answer:
27157


question:
['1815', 'U', '869', 's', '1847', 'C', '2711', 'S', 'i', '7949', '4477', '5093', 'D', '8661', '3835', '4087', '73', 'V', '3149', 's']
answer:
44566


question:
['l', '5617', 'e', '4407', '2585', '9823', 'k']
answer:

22432


