C Program to Print Bills [Formatting and Alignment]

#include<stdio.h>
main()
{
double milk=7.00;
double shirt=50.00;
double watch=37;
double fridge=1100;
double a,b,c,d;
double h,i,j,k;
printf("Enter the quantity of milk purchased n");
scanf("%lf",&a);
h=a*milk;
printf("Enter the quantity of shirt purchased n");
scanf("%lf",&b);
i=b*shirt;
printf("Enter the quantity of watch purchased n");
scanf("%lf",&c);
j=c*watch;
printf("Enter the quantity of fridge purchased n");
scanf("%lf",&d);
k=d*fridge;
double tbill=h+i+j+k;
printf("BILL SUMMARYn ");
printf("__________________________________________________________________________________________ n");
printf("SL NO             ITEM NAME             QTY                   PRICE     n");
printf("1.                MILK                   %lf                   %lf      n",a,h);
printf("2.                SHIRT                  %lf                   %lf      n",b,i);
printf("3.                WATCH                  %lf                   %lf      n",c,j);
printf("4.                FRIDGE                 %lf                   %lf      n",d,k);
printf("__________________________________________________________________________________________ n");
printf("TOTAL BILL AMOUNT = %lf n",tbill);
printf("__________________________________________________________________________________________ n");
printf("....HAPPY SHOPPING.... n");
}