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:
['q', '5151', 'R', '441']
answer:
5592


question:
['4975', 'M', 'C', 'D', 't', 'i', 't', 'L']
answer:
4975


question:
['5015', 'x', 'O', 'F']
answer:

5015