I can suggest some of the popular supermarkets in Lodz, Poland, where you may be able to find affordable prices for your grocery shopping:

1. Biedronka: This is a popular discount supermarket chain in Poland, offering a wide range of products at competitive prices. Biedronka is a discount supermarket chain owned by the Portuguese company Jeronimo Martins. It has over 3,000 stores in Poland and offers a wide range of products, including groceries, household items, and electronics. Biedronka is known for its low prices and weekly promotions, which attract many customers.
2. Lidl: Another well-known discount supermarket chain that offers a variety of products at affordable prices. Lidl is a German discount supermarket chain that operates in many European countries, including Poland. It offers a range of products, including fresh produce, meat, bakery items, and household items. Lidl is known for its high-quality products at affordable prices, and its stores are designed to be efficient and easy to navigate.
3. Aldi: Aldi is a discount supermarket chain that operates in many European countries, including Poland, and offers good value for money. Aldi is a German discount supermarket chain that operates in many European countries, including Poland. It offers a range of products, including groceries, household items, and electronics. Aldi is known for its low prices and high-quality products, and it has a simple and efficient shopping experience.
4. Tesco: This British supermarket chain is also present in Poland and offers competitive prices on many products. Tesco is a British supermarket chain that operates in many countries, including Poland. It offers a wide range of products, including groceries, household items, and electronics. Tesco is known for its low prices and large stores that offer a wide variety of products.
5. Auchan: Auchan is a French supermarket chain that operates in many countries, including Poland, and offers a wide range of products at affordable prices. Auchan is a French hypermarket chain that operates in many countries, including Poland. It offers a wide range of products, including groceries, household items, electronics, and clothing. Auchan is known for its large stores and low prices, and it often has weekly promotions that offer even better deals.

It’s always best to compare prices and quality at different supermarkets before making your purchase. Also, keep in mind that prices may vary depending on the location and the time of year.