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:
['s', 'd', 't', '8235', '2279', '7477', '3029', '4377', '9153', '4309', '2295', '407']

Ex Output:
41561


Ex Input:
['m', '4645', '711', 'l', '5085', '8989', '2387', 'n', 'V', '1613', '4011', '3261', 'p', 'X', '349', 'e']

Ex Output:
31051


Ex Input:
['z', '3603', '1009', 'P', '4003', 'B', '4481', 'q', '9481', '6347', '4771', 'c', 't']

Ex Output:

33695