// editor2
#include<stdio.h>
union Salary
{
    int fulltimesalary;
    float parttimerate;
};
struct employee
{
    char name[100];
    int id;
    int type;
    union salary salary;
};
int main()
{
    int n;
    scanf("%d", &n);
    if(n<0){
        printf("-1\n");
        return 0;
    }
    struct employee emp[n];
    float totalSalary=0;
    for(int i=0;i<n;i++)
    {
        scanf("%s %d %d",emp[i].name,&emp[i].id,&emp[i].type);
        if(emp[i].type==1)
        {
            scanf("%d",&emp[i].salary.fulltimesalary);
            totalSalary+=emp[i].salary.fulltimesalary;
        }
        else if(emp[i].type==2)
             {
            scanf("%1lf",&emp[i].salary.parttimerate);
            totalSalary+=emp[i].salary.parttimerate*20;
        }
    }
    printf("%.2f\n", totalSalary);
    return 0;
}