#include<stdio.h>
type struct {
    char name[50];
    int id,type;
    union { int salary; float rate;};
} Employee;
int main(){
    int n,total=0;
    scanf("%d",&n);
    if(n<0) return printf("-1\n"),0;
    Employee emp;
    for(int i=0;i<n;i++){
        scanf("%s %d %d",emp.name,&emp.id,&emp.type);
        if(emp.type==1) scanf("%d",&emp.salary),total+=emp.salary;
        else scanf("%f",&emp.rate),total+=emp.rate*20;
    }
    printf("%.2f",(float)total);
    return 0;
}