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: 2, 5, ['4311', 'E', 'q', '123', 'K', 'N', '7531', 'x', 'h', 'H', '9919', '705', '3025']

SOLUTION: 123

PROBLEM: 7, 12, ['8785', '221', 'f', 'f', '5743', '4839', '9389', '4759', '1493', 'a', '4951', 'K', '8501', '3331', '2069', '2713', 'j', '7557', 'p', '7679', 'S', '6499', 'E', '439', 't', 'P', 'i', 'u', '8401', 'o']

SOLUTION: 20592

PROBLEM: 1, 3, ['p', 'l', '225']

SOLUTION:
225