The cheapest sensible trip. Walking is free, the subway is $2.90 each way, and we only suggest a second store when it's close by and really saves you money.
No location yet, so this is across NYC. Pick one to count walking and fares.
Not reported here: Sliced bread (loaf), Black beans (can).
Splitting across stores isn't worth it here: the savings are small or the stores are too far apart.