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.

Ex Input:
['D', '1259', '8927', '3345', '553', '7209', '2507', 'l', 'o', '7317', '1227', '6749', 'S', '3171', 'I', '197', '9577', 'j', 'Q']

Ex Output:
52038


Ex Input:
['a', 'm', '3205', '1869', '1117', 'K', '5785']

Ex Output:
11976


Ex Input:
['R', '7713', 'H', '5297', '9583', '4335', 'j']

Ex Output:

26928