This tutorial will teach you  to make a small shop Grocery Shop Inventory management system in C#.Net.how make a system.in in c#.net step by step. The following  system will use to manage the Grocery Shop sales calculation. If you are an interested in pos in c#.net this is the right place where you will able learn inventory management system c#.net more projects.

Features of the System

1. User shall be able to select the item what they need.
2. User shall be able to calculate the total

Paste the code inside the ok button

double sum = 0.0;
           double price;
           double qty;
           double cal = 0.0;

           if (chk1.Checked)
           {
               String suger = chk1.Text;
               String mes = txtsstatus.SelectedItem.ToString();
               price = 140.0;
               qty = int.Parse(txtsqty.Text);

               if (mes.Equals("KG"))
               {
                   cal = (qty * price);
                   this.dataGridView1.Rows.Add(suger, price, qty, cal);
              
               }
               else
               {
                   cal = (qty / 1000 * price);

                   this.dataGridView1.Rows.Add(suger, price, qty, cal);
               }

           }

               if (chk2.Checked)
               {
                   String tea = chk2.Text;
                   String mes1 = txttstatus.SelectedItem.ToString();
                   price = 150.0;
                   qty = int.Parse(txttqty.Text);

                   if (mes1.Equals("KG"))
                   {
                         cal = (qty * price);
                         this.dataGridView1.Rows.Add(tea, price, qty, cal);
                   }
                   else
               {
                   cal = (qty / 1000 * price);

                   this.dataGridView1.Rows.Add(tea, price, qty, cal);
               }
                  
              }
              if (chk3.Checked)
               {
                   String flour = chk3.Text;
                   String mes2 = txtfstatus.SelectedItem.ToString();
                   price = 260.0;
                   qty = int.Parse(txtfqty.Text);

                   if (mes2.Equals("KG"))
                   {
                         cal = (qty * price);
                         this.dataGridView1.Rows.Add(flour, price, qty, cal);
                   }
                   else
               {
                   cal = (qty / 1000 * price);
                   this.dataGridView1.Rows.Add(flour, price, qty, cal);
               }
                  
              }

              if (chk4.Checked)
              {
                  String rice = chk4.Text;
                  String mes3 = txtrstatus.SelectedItem.ToString();
                  price = 250.0;
                  qty = int.Parse(txtrqty.Text);

                  if (mes3.Equals("KG"))
                  {
                      cal = (qty * price);
                      this.dataGridView1.Rows.Add(rice, price, qty, cal);
                  }
                  else
                  {
                      cal = (qty / 1000 * price);
                      this.dataGridView1.Rows.Add(rice, price, qty, cal);
                  }

              }

              if (chk5.Checked)
              {
                  String dhall = chk5.Text;
                  String mes4 = txtdstatus.SelectedItem.ToString();
                  price = 300.0;
                  qty = int.Parse(txtdqty.Text);

                  if (mes4.Equals("KG"))
                  {
                      cal = (qty * price);
                      this.dataGridView1.Rows.Add(dhall, price, qty, cal);
                  }
                  else
                  {
                      cal = (qty / 1000 * price);
                      this.dataGridView1.Rows.Add(dhall, price, qty, cal);
                  }
              }

           for(int row=0; row< dataGridView1.Rows.Count; row++)
           {
               sum = sum + Convert.ToInt32(dataGridView1.Rows[row].Cells[3].Value);
           }
           txtbill.Text = sum.ToString();

i have attached the video link below. which will do this tutorials step by step.