Procedures.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Task3
{
    public partial class Procedures : Form
    {

        int nudEarsCleanAndFlushOldValue;
        int nudLuxationOldValue;
        int nudSlingOldValue;
        int nudWoundSoreOldValue;
        int nudLacerationsOldValue;
        int nudBloodPressureOldValue;
        int nudECGOldValue;
        int nudTeethExtractionOldValue;
        int nudCatheterOldValue;
        int nudBiopsyOldValue;
        int nudRadiographOldValue;
        int nudPotassiumOldValue;
        int nudIVOldValue;

        public static string ProceduresTotal = "";

        public Procedures()
        {
            InitializeComponent();
        }

        private void btnPrevious_Click(object sender, EventArgs e) //Previous button
        {
            Form Start = new Medication();
            this.Hide();
            Start.Show();
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void btnNextForm4_Click(object sender, EventArgs e)
        {
            Form finish = new Receipt();
            this.Hide();
            finish.Show();

            ProceduresTotal = price.Text;
        }

        private decimal Calculate(int count, string nudName)
        {
            decimal price;
            decimal result = 0;

            switch (nudName)
            {
                case "UpdownEarsCleanAndFlush":
                    count -= nudEarsCleanAndFlushOldValue;
                    price = 8.00m;
                    result = price * count;
                    break;

                case "UpdownLuxation":
                    count -= nudLuxationOldValue;
                    price = 48.67m;
                    result = price * count;
                    break;

                case "UpdownSling":
                    count -= nudSlingOldValue;
                    price = 1.20m;
                    result = price * count;
                    break;

                case "UpdownWoundsore":
                    count -= nudWoundSoreOldValue;
                    price = 2.99m;
                    result = price * count;
                    break;

                case "UpdownLacerations":
                    count -= nudLacerationsOldValue;
                    price = 98.00m;
                    result = price * count;
                    break;

                case "UpDownBloodPressure":
                    count -= nudBloodPressureOldValue;
                    price = 0.95m;
                    result = price * count;
                    break;

                case "UpDownECG":
                    count -= nudECGOldValue;
                    price = 133.45m;
                    result = price * count;
                    break;

                case "UpDownTeethExtraction":
                    count -= nudTeethExtractionOldValue;
                    price = 96.55m;
                    result = price * count;
                    break;

                case "UpDownCatheter":
                    count -= nudCatheterOldValue;
                    price = 35.00m;
                    result = price * count;
                    break;

                case "UpDownBiopsy":
                    count -= nudBiopsyOldValue;
                    price = 389.00m;
                    result = price * count;
                    break;

                case "UpDownRadiograph":
                    count -= nudRadiographOldValue;
                    price = 10.29m;
                    result = price * count;
                    break;

                case "UpDownPotassium":
                    count -= nudPotassiumOldValue;
                    price = 0.45m;
                    result = price * count;
                    break;

                case "UpDownIV":
                    count -= nudIVOldValue;
                    price = 3.90m;
                    result = price * count;
                    break;

                    //...add other cases for different medicine

                default:
                    break;
            }

            return result;
        }