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', 'v', 't', '223', 'm', 'l', 'c', 'M', 'b', '2227', 'P', 'e', 'n', 'f', 'S', '2205', '3517', '5545']
answer:
13717


question:
['2325', '3259', '1947', '8065', 'H', '2329', 'h', 'l', 'k', 'R']
answer:
17925


question:
['y', '7215', '5219', 'n', 'D']
answer:

12434