Coffee prices

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Numerics;
namespace CoffeeOrders
{
    class CoffeeCost
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            Dictionary<DateTime,int> Dictionary = new Dictionary<DateTime,int>();
            DateTime[] newdDateTime=new DateTime[N];
            int[] numberofPills = new int[N];
            int[] numberofDays = new int[N];
            decimal[] initialprices=new decimal[N];
            decimal[] prices = new decimal[N];
            decimal totalPrice = 0;
            for (int i = 0; i < N; i++)
            {
                initialprices[i] = decimal.Parse(Console.ReadLine());
                Dictionary.Add(DateTime.ParseExact(Console.ReadLine(),"d/M/yyyy",null), int.Parse(Console.ReadLine())); //Add key/value pairs to dictionary
                foreach(KeyValuePair<DateTime,int> pair in Dictionary)
                {
                    numberofPills[i]=pair.Value; //assing KeyValue p
                }
                foreach (KeyValuePair<DateTime, int> secondpair in Dictionary)
                {
                    numberofDays[i] = DateTime.DaysInMonth(secondpair.Key.Year,secondpair.Key.Month); //get DaysInMonth via passing keyvaluepair Key and Value as arguments
                }
                prices[i] += ((decimal)numberofDays[i] * (decimal)numberofPills[i] * initialprices[i]); //calculate prices for coffee
                totalPrice += prices[i];

            }
            for (int j = 0; j < N; j++)
            {
                Console.WriteLine("The price for the coffee is: ${0:0.00}", Math.Round(prices[j],2));

            }
            Console.WriteLine("Total: ${0:0.00}",Math.Round(totalPrice,2));

        }
    }
}