не знам как да довърша и реша задачата

using System;

namespace Fruit_Shop
{
internal class Program
{
static void Main(string[] args)
{
string fruit = Console .ReadLine ();
string day = Console .ReadLine ();
double quantuty = double.Parse (Console .ReadLine ());
double priceBanana = 0;
double priceApple = 0;
double priceOrange= 0;
double priceGrapefruit = 0;
double priceKiwi = 0;
double pricePineapple = 0;
double priceGrapes = 0;

if (fruit == "banana" || fruit == "apple" || fruit == "orange" || fruit == "grapefruit"||
fruit == "kiwi"|| fruit == "pineapple"|| fruit == "grapes")
{
if (day== "Monday" || day == "Tuesday"|| day == "Wednesday"|| day == "Thursday"|| day == "Friday")
{
priceBanana = 2.50;
priceApple =1.20;
priceOrange = 0.85;
priceGrapefruit = 1.45;
priceKiwi =2.70 ;
pricePineapple = 5.50;
priceGrapes =3.85 ;

}
else if (day=="Saturday" || day=="Sunday")
{
priceBanana = 2.70;
priceApple = 1.25;
priceOrange = 0.90;
priceGrapefruit =1.60 ;
priceKiwi =3.00;
pricePineapple = 5.60;
priceGrapes = 4.20;

}
else
{
Console.WriteLine("error");
}
}
else
{
Console.WriteLine("error");
}

}
}
}

using System; namespace _11FruitShop { class Program { static void Main(string[] args) { string fruit = Console.ReadLine(); string day = Console.ReadLine(); double quantity = double.Parse(Console.ReadLine()); double price = 0; if ((day == "Monday" || day == "Tuesday" || day == "Wednesday" || day == "Thursday" || day == "Friday") && (fruit == "banana" || fruit == "apple" || fruit == "orange" || fruit == "grapefruit" || fruit == "kiwi" || fruit == "pineapple" || fruit == "grapes")) { switch (fruit) { case "banana": price = 2.50; break; case "apple": price = 1.20; break; case "orange": price = 0.85; break; case "grapefruit": price = 1.45; break; case "kiwi": price = 2.70; break; case "pineapple": price = 5.50; break; case "grapes": price = 3.85; break; default: Console.WriteLine("error"); break; } Console.WriteLine($"{(quantity * price):f2}"); } else if ((day == "Saturday" || day == "Sunday") && (fruit == "banana" || fruit == "apple" || fruit == "orange" || fruit == "grapefruit" || fruit == "kiwi" || fruit == "pineapple" || fruit == "grapes")) { switch (fruit) { case "banana": price = 2.70; break; case "apple": price = 1.25; break; case "orange": price = 0.90; break; case "grapefruit": price = 1.60; break; case "kiwi": price = 3.00; break; case "pineapple": price = 5.60; break; case "grapes": price = 4.20; break; default: Console.WriteLine("error"); break; } Console.WriteLine($"{(quantity * price):f2}"); } else { Console.WriteLine("error"); } } } }