URI - 1051 - Taxes

#include <bits/stdc++.h>
using namespace std;

int main(){
    double sal;
    cin >> sal;
    double totalTax = 0.0;
    double newSal = 0.0;
    double tempSal = 0.0;
    double raise = 0.0;
    if(sal > 2000.00){
        if(sal >= 4500.01){
            newSal = (sal - 4500.00);
            raise = 28.00;
            tempSal = (newSal*raise)/100.00;
            totalTax += tempSal;
            sal = (sal - newSal);
        }
        if(sal >= 3000.01 && sal <= 4500.00){
            newSal = (sal - 3000.00);
            raise = 18.00;
            tempSal = (newSal*raise)/100.00;
            totalTax += tempSal;
            sal = (sal - newSal);
        }
        if(sal >= 2000.01 && sal <= 3000.00){
            newSal = (sal - 2000.00);
            raise = 8.00;
            tempSal = (newSal*raise)/100.00;
            totalTax += tempSal;
            sal = (sal - newSal);
        }
    }
    if(totalTax == 0.0){
        printf("Isento\n");
    }else{
        printf("R$ %0.2lf\n", totalTax);
    }
    return 0;
}