#include <iostream> #include <iomanip> using namespace std; int main() { double prices[] = {28.9, 32.7, 45.6, 78.0, 35.0, 86.2, 27.8, 43.0, 56.0, 65.0}; int quantities[10]; double total_cost = 0.0; for (int i = 0; i < 10; i++) { cin >> quantities[i]; total_cost += prices[i] * quantities[i]; } cout << fixed << setprecision(1) << total_cost << endl; return 0; }