Buy once, use twice
Diwali & Karthigai Deepam
What both occasions need, what each needs alone, and how much overlap there is to save on.
Two relationships converging on one product from opposite directions. The quantities are summed from both edges, so the total is what to actually buy.Occasion → NEEDS → Product ← NEEDS ← Occasion
10
Shared items
Needed by both
8
Only Diwali
2
Only Karthigai Deepam
Buy these once
Needed by both occasions — the combined quantity is what to pick up.
| Item | Diwali | Karthigai Deepam | Buy in total |
|---|---|---|---|
| Agarbathi | Essential | Essential | 3 packets |
| Brass Lamp (Kuthu Vilakku) | Recommended | Recommended | 2 pieces |
| Camphor | Essential | Essential | 2 packets |
| Clay Diyas | Essential | Essential | 16 dozen |
| Coconut | Essential | Essential | 4 pieces |
| Cotton Wicks | Essential | Essential | 5 packets |
| Ghee | Recommended | Recommended | 2 bottles |
| Jaggery | Recommended | Essential | 2 kg |
| Marigold (Loose) | Essential | Recommended | 4 kg |
| Sesame Oil | Essential | Essential | 5 bottles |
Roughly ₹2,550 of overlap at list prices — bought once instead of twice.