URI Online Judge | 1985

# MacPRONALTS

By Victor Jatobá, UNIME Brazil

Timelimit: 1

The MacPRONALTS is with a super promotion, exclusive to the contestants of the first Selective MaratonaTEC. But they had a problem, all runners were trying to buy at the same time, so this generated a very long queue. The worst is that the cashier girl no have calculator or a program to help her to calculate more quickly. You are the person that will help the girl and the MacPRONALTS increase their sells. Bellow has a menu day, that contains the product number and its value.

1001 | R\$ 1.50

1002 | R\$ 2.50

1003 | R\$ 3.50

1004 | R\$ 4.50

1005 | R\$ 5.50

## Input

The first entry is reported the number of purchased products (1 <= p <= 5). For each product follows the quantity (1 <= q <= 500) that the customer purchased.

Obs .: the product number will not be repeated.

## Output

You must print the purchase amount with two decimal places.

 Input Sample Output Sample 2 1001 2 1005 3 19.50
 1 1003 500 1750
 5 1001 500 1005 300 1003 23 1002 52 1004 44 2808.5