retail <- data.frame(
  BillID = c(501,502,503,504,505,506),
  CustomerName = c("Aman","Riya","Karan","Neha","Rohit","Simran"),
  Gender = c("Male","Female","Male","Female","Male","Female"),
  Membership = c("Gold","Silver","Gold","None","Silver","Gold"),
  Category = c("Grocery","Electronics","Clothing","Grocery","Electronics","Clothing"),
  Quantity = c(10,1,3,8,2,5),
  CostPrice = c(50,20000,800,60,18000,700),
  SellingPrice = c(70,25000,1000,80,22000,900),
  Discount = c(100,2000,150,50,500,300),
  DeliveryType = c("Home","Store","Home","Store","Home","Home"),
  stringsAsFactors = FALSE
)