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', '6383', 'P', '8455', '3881', '5821', 'e', 'v', '1421', 'Q', '6377', '3157', '6407', 'q']
answer:
41902


question:
['U', '5607', 'Q', 'j', 'I', '3745', '3031']
answer:
12383


question:
['7645', 'n', '8403', 'K', 'W', 'f', '6141', 'D', 'v', 'U', 'I', 'X', 'R', '6261', 'F', '5251', 'L', 'I', 'k', 'X']
answer:

33701