05. Supplies for School

#include <iostream>

using namespace std;

int main() {
    int penCount, markerCount, detergentCount;
    cin >> penCount >> markerCount >> detergentCount;

    double discount;
    cin >> discount;

    double penPrice = penCount * 5.80;
    double markerPrice = markerCount * 7.20;
    double detergentPrice = detergentCount * 1.20;

    double totalPrice = (1 - discount / 100) * (penPrice + markerPrice + detergentPrice);

    cout << totalPrice << endl;

    return 0;
}