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: 11, 13, ['L', 'v', 'o', '8089', 'u', '7105', '4451', '9785', 'e', 'p', 'p', '7077', '2815', 'v', 'p', '3593', 't', '6771', 'd', '2651']

SOLUTION: 9892

PROBLEM: 12, 19, ['x', 'Z', 'm', '3819', 'D', 'P', '4815', 'D', 'V', '1409', 'u', 'N', 'E', 'A', 'v', 'k', '553', '1869', '6203', '803', '4061']

SOLUTION: 8625

PROBLEM: 2, 17, ['x', '1231', 'b', 'z', 'a', '9501', 'G', '5399', '905', '6317', '1023', 'J', 'g', '179', 'F', '6933', '8469']

SOLUTION:
39957