Buy once, use twice
Karthigai Deepam & Pongal
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
7
Shared items
Needed by both
5
Only Karthigai Deepam
5
Only Pongal
Buy these once
Needed by both occasions — the combined quantity is what to pick up.
| Item | Karthigai Deepam | Pongal | Buy in total |
|---|---|---|---|
| Bananas | Recommended | Essential | 3 dozen |
| Camphor | Essential | Essential | 2 packets |
| Clay Diyas | Essential | Recommended | 11 dozen |
| Coconut | Essential | Essential | 5 pieces |
| Jaggery | Essential | Essential | 3 kg |
| Marigold (Loose) | Recommended | Recommended | 2 kg |
| Puffed Rice (Pori) | Essential | Recommended | 2 kg |
Roughly ₹555 of overlap at list prices — bought once instead of twice.