TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 25, 27, ['6411', '2467', 'y', '4973', 'C', '8853', 'H', 'G', 'a', 'N', '3759', '7803', '5403', 'Z', '4047', '6283', 'v', '5437', 'p', 't', 'S', '7605', 's', 'Z', '7537', 'Y', 'U', 'W', '2147', 'K']

SOLUTION: 7537

PROBLEM: 3, 14, ['D', 'Q', 'W', '3925', '7569', '2455', '9499', 'A', '3205', '9459', 't', '9053', 'q', 'T']

SOLUTION: 45165

PROBLEM: 4, 5, ['8819', '1879', '4641', '687', '1653', 'u', '1013', '3469', '205', 'h']

SOLUTION:
2340

