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.

['k', '1489', 'x', '6543', 'I', 'l', 'D', '6299', '1473', 'a', '7661', 'z', 'E', 'Z', 'U', '3671', '2873', 'e', 'p']
30009

['2469', 'c', '6931', 'a', '2167', '9493', '9403', '4123', '4949', 'R', 'V', 'h', '315', 'T', '9411', 'M', '1329', '8217', '6105', 'Y']
64912

['v', '6239', 'S', 'D', '7113', '9127', 'y', '6059', '4555', '2573', 'Q', 'E', 'E', 'U', '7153', '4953', '9171', '2309']

59252