Write a 'C' program to get total amount for used Nepal telecom calls

//Nepal telecom calculates the bill according to following rule.
//minimum charge is Rs. 100 for 100 calls.
//if calls exceed 100 then charge is Rs. 1/call is added with 10% tax and 13% vat cumulatively on total amount. Write a 'C' program for this.

#include<stdio.h>
#include<conio.h>
void main()
{
float total_call,extra_call;
float initial_call=0;
float total_amount;

printf("enter total calls used\n");
scanf("%f",&total_call);
if(total_call<=100)
    {
          printf("total amount to be paid=Rs. 100\n");
    }
elseif(total_call>100)
    {
         extra_call=total_call-100;
          while(initial_call<=extra_call)
          {
           initial_call++:
         total_amount=1+initial_call*0.1+initial_call*0.13;
          }
 
         printf("the total amount=%f\n",total_amount);
      }  
}
printf("thank you!!!!\n");
getch();
}