How do I fix these errors

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C#

Hello everyone!
Im very new to C# and I am trying to complete my assignment but I came across some errors that I don't understand how to fix or even what they are implying.

using System;
public class Assignment1B
{
    public static void Main(string[] args)
    {
        string item_one, itemtwo;
        int itemone_quantity, itemtwo_quantity;
        float itemone_cost, itemtwo_cost, itemone_total, itemtwo_total;

        // Asking first item
        Console.Write("What are you buying? ");
        item_one = Console.ReadLine();
        Console.Write("How many? ");
        itemone_quantity = int.Parse(Console.ReadLine());
        Console.Write("What do they cost? ");
        itemone_cost = float.Parse(Console.ReadLine());
        Console.WriteLine();

        // Asking second item
        Console.Write("What else are you buying? ");
        itemtwo = Console.ReadLine();
        Console.Write("How many? ");
        itemtwo_quantity = int.Parse(Console.ReadLine());
        Console.Write("What do they cost? ");
        itemtwo_cost = float.Parse(Console.ReadLine());
        Console.WriteLine();

        // Math
        itemone_total = itemone_quantity * (float)itemone_cost;
        itemtwo_total = itemtwo_quantity * (float)itemtwo_cost;

        // Listing everything
        Console.WriteLine("Your list:");
        Console.WriteLine("--------");
        Console.Write(item_one, " (" + itemone_quantity + " )");
        Console.Write(itemone_cost, " (" + itemone_total + " )");
        Console.WriteLine();
        Console.Write(itemtwo, " (" + itemtwo_quantity + " )");
        Console.Write(itemtwo_cost, " (" + itemtwo_total + " )");

    }
}

The assignment wants me to asks you for the name, quantity, and price of two grocery store items. Then display them as a list.

What I have tried:

I have tried looking up the error codes individually to try and see if I can find an example to get a better understanding of why I am getting the error but I havent found anything that deeply explains everything. Sorry I am still learning and I am open to any advice or tips.

I receive an error for:
item_one = Console.ReadLine();
itemone_quantity = int.Parse(Console.ReadLine());
itemone_cost = float.Parse(Console.ReadLine());
Console.Write(item_one, " (" + itemone_quantity + " )");
Console.Write(itemone_cost, " (" + itemone_total + " )");
Console.Write(itemtwo, " (" + itemtwo_quantity + " )");
Console.Write(itemtwo_cost, " (" + itemtwo_total + " )");

Thank you