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.

['C', '3893', 'O', '9325', 'h', '5417', 'M', 'H', '4397', '9259', 'o', '2793', 'p', '2949', 'a', '6127', 'M', 's', '3691', '4671']
52522