borrowed 2026-11-01, due 2026-11-15 (14 days)
returned 2026-11-12 ( -3 days vs due) -> fine Rs 0
returned 2026-11-15 ( +0 days vs due) -> fine Rs 0
returned 2026-11-16 ( +1 days vs due) -> fine Rs 2
returned 2026-11-20 ( +5 days vs due) -> fine Rs 10
returned 2026-12-15 (+30 days vs due) -> fine Rs 60