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:
['t', 'G', '217', 'W', 'l', 'j', 'd', 'U', '6795', '1609', 'n', '6919', '617', '5753']
answer:
21910


question:
['5573', '6221', 'C', '8649', '6603', 'q', '9403']
answer:
36449


question:
['1045', 's', '3981', 'c', '1377', '5751', '53', '1289', '2915']
answer:

16411