#include<bits/stdc++.h>
using namespace std;
int m,p;
double ans,n1,n2;
char c1[10],c2[10];
void clenc(){
    c1[0]=0,c1[1]=0,c1[2]=0,c1[3]=0,c1[4]=0,c1[5]=0,c1[6]=0,c1[7]=0,c1[8]=0,c1[9]=0;
}
int main(){
//    freopen("personaltax.in","r",stdin);
//    freopen("personaltax.out","w",stdout);
    cin>>m;
    while(cin>>c1){
        cin>>c2,cin>>c2;
        cin>>n1;
        if(c1[0]=='P'&&c1[1]=='A'&&c1[2]=='Y') {
            if(n1<=800) continue;
            n1-=800;
            if(n1<=500){
                ans+=n1*0.05;
                continue;
            }
            if(n1>500){
                ans+=500*0.05;
            }
            if(n1<=2000){
                ans+=(n1-500)*0.1;
                continue;
            }
            if(n1>2000){
                ans+=1500*0.1;
            }
            if(n1<=5000){
                ans+=(n1-2000)*0.15;
                continue;
            }
            if(n1>5000){
                ans+=3000*0.15;
            }
            if(n1<=20000){
                ans+=(n1-5000)*0.2;
                continue;
            }
            if(n1>20000){
                ans+=15000*0.2;
            }
            if(n1<=40000){
                ans+=(n1-20000)*0.25;
                continue;
            }
            if(n1>40000){
                ans+=20000*0.25;
            }
            if(n1<=60000){
                ans+=(n1-40000)*0.3;
                continue;
            }
            if(n1>60000){
                ans+=20000*0.3;
            }
            if(n1<=80000){
                ans+=(n1-60000)*0.35;
                continue;
            }
            if(n1>80000){
                ans+=20000*0.35;
            }
            if(n1<=100000){
                ans+=(n1-80000)*0.4;
                continue;
            }
            if(n1>100000){
                ans+=20000*0.4;
                ans+=(n1-100000)*0.45;
                continue;
            }
        }
        if(c1[0]=='I'&&c1[1]=='N'&&c1[2]=='C'&&c1[3]=='O'&&c1[4]=='M'&&c1[5]=='E'){
            if(n1<=800) continue;
            if(n1<=4000) n1-=800;
            else n1=n1-n1*0.2;
            if(n1<=20000) {
                ans+=n1*0.2;
                continue;
            }
            if(n1>20000) ans+=20000*0.2;
            if(n1<=50000) {
                ans+=(n1-20000)*0.3;
                continue;
            }
            if(n1>50000) ans+=(n1-50000)*0.4;
        }
        clenc();
    }
    cout<<ans;
    
    
    
    
    
    return 0;
}