#include<bits/stdc++.h>
#define ll long long
using namespace std;
int m;
string a;
double ans;
int b[60000][20];
void cop(int x)
{
	double s;
	 s=x-800;
	 if(s<=0) return;
	if(s<=500)
	{
		ans+=s*0.05;
		return;
	}
	s-=500;ans+=500*0.05;
	if(s<=1500)
	{
		ans+=s*0.1;
		return;
	}
	s-=1500;ans+=1500*0.1;
	if(s<=3000)
	{
		ans+=s*0.15;
		return;
	}
	s-=3000;ans+=3000*0.15;
	if(s<=15000)
	{
		ans+=s*0.2;
		return;
	}
	s-=15000;ans+=15000*0.2;
	if(s<=20000)
	{
		ans+=s*0.25;
		return;
	}
	s-=20000;ans+=20000*0.25;
	if(s<=20000)
	{
		ans+=s*0.3;
		return;
	}
	s-=20000;ans+=20000*0.3;
	if(s<=20000)
	{
		ans+=s*0.35;
		return;
	}
	s-=20000;ans+=20000*0.35;
	if(s<=20000)
	{
		ans+=s*0.4;
		return;
	}
	s-=20000;ans+=20000*0.4;
	ans+=s*0.45;
}
void pay()
{
	int n,x,z,my;
	char y;
	cin>>n>>x>>y>>z>>my;
	b[n][x]+=my;
}
void ic()
{
	int n,x,z,my;
	char y;
	cin>>n>>x>>y>>z>>my;
	double s;
	if(my<=4000) s=my-800;
	else s=double(my*0.8);
	if(s<=0) return;
	if(s<=20000)
	{
		ans+=s*0.2;
		return;
	}
	s-=20000;ans+=20000*0.2;
	if(s<=30000)
	{
		ans+=s*0.3;
		return;
	}
	s-=30000;ans+=30000*0.3;
	ans+=s*0.4;
}
int main(){
	freopen("personaltax.in","r",stdin);
	freopen("personaltax.out","w",stdout);
cin>>m;
while(1)
{
	cin>>a;
	if(a=="#") break;
	if(a=="PAY") pay();
	if(a=="INCOME") ic();
}
for(int q=1;q<=m;q++)
{
	for(int w=1;w<=12;w++)
	{
		cop(b[q][w]);
	}
}
printf("%.2lf",ans);
return 0;
}