#include<iostream>
#include<iomanip>
#include<string>
using namespace std;
int main()
{
    string member;
    int dis;
    float dur,cost,x;
    cin>>member>>dis>>dur;
    if(memeber=="Basic")
    {
        cost=(dur*30);
        if(dis==1)
        {
            x=cost-(cost*20)/100;
            cout<<fixed<<setprecision(2)<<x;
        }
        else if(dis==0)
        {
            cout<<fixed<<setprecision(2)<<cost;
        }
        else
        {
            cost=(dur*50);
        }
    }
    else if(member=="Standard")
    {
        cost=(dur*50);
        if(dis==1)
        {
            x=cost-(cost*20)/100;
            cout<<fixed<<setprecision(2)<<x;
        }
        else if(dis==0)
        {
            cout<<fixed<<setprecision(2)<<cost;
        }
        else
        {
            cost=(dur*50);
        }
    }
    else if(member=="Premium")
    {
        cost=(dur*80);
        if(dis==1)
        {
            x=cost-(cost*20)/100;
            cout<<fixed<<setprecision(2)<<x;
        }
        else if(dis==0)
        {
            cout<<fixed<<setprecision(2)<<cost;
        }
        else
        {
            cost=(dur*50);
        }
    }
    return 0;
}