Dev - C++ - no se como hacer este problema necesito que me oriente

#include <iostream>

using namespace std;

int main()

{

    int hec1, hec2, hec3, sumahec;

    cout << "Hectareas 1: "; cin >> hec1;

    cout << "Hectareas 2: "; cin >> hec2;

    cout << "Gectareas 3: "; cin >> hec3;

    cout << "\nComprador 1: " << hec1 << " hectareas"

         << "\nCoste: " << hec1 * 30000

         << "\nDescuento: " << hec1 * 30000 * 0.07

         << "\nTotal: " << hec1 * 30000 - (hec1 * 30000 * 0.07)

         << endl;

    cout << "\nComprador 2: " << hec2 << " hectareas"

         << "\nCoste: " << hec2 * 30000

         << "\nDescuento: " << hec2 * 30000 * 0.07

         << "\nTotal: " << hec2 * 30000 - (hec2 * 30000 * 0.07)

         << endl;

    cout << "\nComprador 3: " << hec3 << " hectareas"

         << "\nCoste: " << hec3 * 30000

         << "\nDescuento: " << hec3 * 30000 * 0.07

         << "\nTotal: " << hec3 * 30000 - (hec3 * 30000 * 0.07)

         << endl;

    sumahec = hec1 + hec2 + hec3;

    cout << "\nTotal Hectareas vendidas: " << sumahec

         << "\nTotal ingresos: " << sumahec * 30000 - (sumahec * 30000 * 0.07)

         << endl;

}