//Armadno Vlajcic III Gimnazija

//Senior 3

//2012 contest 1

#include <iostream>

using namespace std;

int main ()

{

int location;

double times[14], paid=0, working=0;

char timesC[14];

for (int i=0; i<5; i++){

working=paid=0;

cin>>location;

for (int j=0; j<14;j++){

cin>>timesC[j];

if (timesC[j]>='1' && timesC[j]<='9')

times[j]=(timesC[j]-'0')*0.5+8.5;

else

times[j]=(timesC[j]-'A'+10)*0.5+8.5;

}

//LOKACIJE DO 200

if (location>=100 && location<200)

{

for (int j=1; j<14; j+=2){

paid+=(times[j]-times[j-1])*10;

working+=times[j]-times[j-1];

}

if (working>30)

paid+=(working-30)*5;

if ((int)(paid*1000)%10>4)

paid+=0.01;

printf("$%.2f\n", paid);

}

//LOKACIJE DO 300

else if (location>=200 && location<300)

{

for (int j=1; j<14; j+=2){

paid+=(times[j]-times[j-1])*7.5;

working+=times[j]-times[j-1];

}

if (working>40){

paid+=(working-40)*15;

paid-=(working-40)*7.5;

}

if ((int)(paid*1000)%10>4)

paid+=0.01;

printf("$%.2f\n", paid);

}

//LOKACIJE DO 400

else if (location>=300 && location<400)

{

for (int j=1; j<14; j+=2){

paid+=(times[j]-times[j-1])*9.25;

working+=times[j]-times[j-1];

}

if (working>20){

paid+=(working-20)*10.5;

paid-=(working-20)*9.25;

}

if ((int)(paid*1000)%10>4)

paid+=0.01;

printf("$%.2f\n", paid);

}

//LOKACIJE DO 500

else if (location>=400 && location<500)

{

for (int j=1; j<14; j+=2){

if (j==1 || j==13)

paid+=(times[j]-times[j-1])*13.5;

else

paid+=(times[j]-times[j-1])*6.75;

}

if ((int)(paid*1000)%10>4)

paid+=0.01;

printf("$%.2f\n", paid);

}

//LOKACIJE DO 600

else

{

for (int j=1; j<14; j+=2){

paid+=(times[j]-times[j-1])*8;

working=times[j]-times[j-1];

if (working>6) {

paid+=(working-6)*12;

paid-=(working-6)*8;

}

}

if ((int)(paid*1000)%10>4)

paid+=0.01;

printf("$%.2f\n", paid);

}

}