#include<stdio.h>
union Pay
{
    int fulltimesalary;
    float partimerate;
};
struct employee
{
    char name[50];
    int id;
    int type;
    union Pay pay;
};
int main()
{
    int n;
    if(scanf("%d",&n)!=1)
    return 0;
    if(n<=0)
    printf("-1");
    return 0;
}
struct employee emp;
double total=0.0;
for(int i=0;i<n;i++)
{
    scanf("%s%d%d",emp.name,&emp.id,&emp.type);
    if(emp.type==1)
    {
        scanf("%d",&emp.pay.fulltimesalary);
        total+=emp.pay.fulltimesalary;
    }
    else if(emp.type==2)
    {
        scanf("%f",&emp.pay.partimerate);
        total+=emp.pay.partimerate;
    }

}
printf("%.2f",total);
}