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: 7, 11, ['n', '851', '1155', '5763', 'k', 'f', '3761', '1167', 'E', 'h', '1261']

SOLUTION: 6189

PROBLEM: 1, 2, ['t', '9343', 'g']

SOLUTION: 9343

PROBLEM: 2, 16, ['p', '4337', 'f', '9921', 'y', '9879', '575', '4463', 'L', '1731', '4831', '4575', '6573', '4533', '1811', 'w', '323', '249', '4517']

SOLUTION:
53229