Total Sales Calculation


#include <stdio.h>
#define TAX_RATE 8.50

int main()
{
  // Local declarations
  int quantity;
  float discountrate;
  float discountamt;
  float unitprice;
  float subtotal;
  float subtaxable;
  float taxam;
  float total;

  // Statements
  printf("Enter the number of items sold:\n");
  scanf("%d", &quantity);
  printf("Enter the unit price:\n");
  scanf("%f", &unitprice);
  printf("Enter the discount rate (percent):\n");
  scanf("%f", &discountrate);

  subtotal = quantity * unitprice;
  discountamt = subtotal * discountrate / 100;
  subtaxable = subtotal - discountamt;
  taxam = subtaxable * TAX_RATE / 100;
  total = subtaxable + taxam;

  printf("\nQuantity sold: %6d\n", quantity);
  printf("Unit price of items: %9.2f\n", unitprice);
  printf("---------------\n");
  printf("Subtotal: %9.2f\n", subtotal);
  printf("Discount: %-9.2f\n", discountamt);
  printf("Discount total: %9.2f\n", subtaxable);
  printf("Sales tax: %+9.2f\n", taxam);
  printf("Total sales: %9.2f\n", total);

  return 0;
}