DA-5: Implement calculation logic

[UchuuJ]

So we're going implement the calculation logic in a Helper Method.
How I see it from a pseudo logic:

FUNCTION CALCULATE_COSTS()
      totalCost = 0
      totalDistance = 0
       FOR distance IN ARRAY no_of_drop_off_locations:
          totalDistance += distance
          totalCost += (cost_per_mile * distance)
       END FOR
       FOR count IN extra_person_count :
          totalCost += extra_person_cost
       END FOR
END FUNCTION

The logic won't represent the final as it's just napkin logic to help me to come up with the correct solution.

[UchuuJ]

Logic implemented at 16:30 😎
Now lets add niceties Took about 2 hrs to implement the actual logic of the tech test.