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: 4, 25, ['5003', '1565', '5397', '415', '6045', '9119', '3383', '5449', 'v', 'C', 'J', 'w', '7791', 'F', 'O', '8827', '7171', '2709', 'f', 'W', 'P', '5175', 'D', '135', 'W', '7021', 'T', 's', '7949']

SOLUTION: 56219

PROBLEM: 2, 2, ['9797', '5585', '1849', '4485', '9225']

SOLUTION: 5585

PROBLEM: 13, 20, ['7021', 'P', 'v', 'z', '4687', 'A', 'z', 'e', '7235', '5207', '6199', '6025', '4801', '7811', '6123', 'T', '751', 'h', '7361', 'g', '9003', '9249']

SOLUTION:
26847