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.

['j', 'A', 'L', 'i', 'I', '3827', '8245', 'H', 'J', '8117', 'w', '4659', 'Y', 'x', 'K']
24848

['1493', 'x', 'h', '31', '3327', '1621', '4529', 'd', '377', 'R', 'X', 'Z', 'G']
11378

['2891', 'M', '8251', '3917', '4363', '1725', 'M', '2741', 'N', 'm', '8813', 's', '6979', 'I', '2717']

42397