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:
['l', 'B', 'Y', '7543', '5091', '1917']
answer:
14551


question:
['V', '2633', '3269', 'r', 'Q', '3517', '2571', 'G', '4105', 'm', 'z', 'B', 'A']
answer:
16095


question:
['K', '4477', '5207', 'l', '6243', 'T', 'r', 'v', '7087', 'R', 'K', 'T', 'I', 'z', 'c', '1965', 'W', '3557', 'm']
answer:

28536