6. Vasya's grandmother loves to pick berries in the forest and then make jam from them. Every weekend she goes by train, spending 200 rubles on tickets and collects 5 kilograms of berries. On the market, you can buy a kilogram of berries for 150 rubles, and sugar for 54 rubles per kilogram. From one kilogram of berries and 1 kilogram of sugar, 1.5 kilograms of jam can be made. Ready-made jam can be bought for 220 rubles per kilogram. What is cheaper for Vasya's grandmother:
1) Picking berries, buying sugar, and making jam;
2) Buying berries and sugar, and making jam;
3) Buying ready-made jam;
4) All of the above options are equally cost-effective.
Answer: 1.

Option 1 - berry picking in the forest. From 1 kilogram of berries collected by the grandmother, 1.5 kilograms of jam can be made. The cost of 1.5 kilograms of jam in this case consists of transportation expenses and the purchase of sugar: $(200 / 5 + 54) = 94$ rubles.

Option 2 - buying berries. To make 1.5 kilograms of jam, you need to buy 1 kilogram of berries and 1 kilogram of sugar, i.e., spend $150 + 54 = 204$ rubles.

Option 3 - buy 1.5 kilograms of ready-made jam: $220 * 1.5 = 330$ rubles.