TASK DEFINITION: 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.
PROBLEM: ['v', '4119', 'I', '475', 'd', 'L', '909', 'F', 'V', '775', 'k', 'A', '9411', '8383', 'W', '1521', 'z', 'j', '7057', 'I']

SOLUTION: 32650

PROBLEM: ['y', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']

SOLUTION: 27212

PROBLEM: ['I', '8895', 'd', 'H', '2159', '4895', '9033', '7467', 'e', '8723', '67', '7997', '8871', '4169']

SOLUTION:
62276