#include<stdio.h>
#define BASE_PRICE 100.0
#define DISCOUNT_RATE 0.10

int main() {
    float subtotal, discount_amount,total_cost;
    
    subtotal = BASE_PRICE;
    discount_amount = subtotal * DISCOUNT_RATE;
    Total_case = subtotal - discount_amount;
    
    printf("Subtotal: $%.2f\n", subtotal);
    printf("Discount Amount:n $%.2f\n", discount_amount);
    printf("Total Cost: $%.2f\n", total_cost);
    
    return 0;
}