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:
['5199', 'h', 'T', 'T', 'l', '1661', 'p']
answer:
6860


question:
['c', 'd']
answer:
0


question:
['f', 'A', 'U', 'P', '2403', '5101', '7205', '7321', 'i', 'R', 'R', 'o', '1055', '87', 'b', 'd', 'p']
answer:

23172