How to structure tables (MySQL) and classes (Java) correctly?

Question

MySQL

Good morning, I have three identical tables that only change the value of one column.
Example:

As you can see in the picture, only the value of the Cost column changes.
I quickly typed them in to make it work. I implemented it this way, I created 3 tables in MySQL (it turns out that I dilated columns for each table). After I coded one common model, then I created 3 DAO classes (for each table) and three Controllers.
Question: How can I put all this in order? (I know that you can’t do this, I just didn’t have enough experience to bring it back to normal. Also, time was not in my favor).

Answer 1

If I understood correctly, then there is one product that has three different prices? So?
Why is it impossible then to put everything in one table of the form:
NAME | PRICE_1 | PRICE_2 | PRICE_3
Formulate what the task is.