Electricity bill

Problem

An electricity bill uses slabs. The first 100 units cost 5 each, the next 100 units (101 to 200) cost 8 each, and every unit above 200 costs 12.

Given the units used, print the total bill.

Example 1

Input

Output

Example 2

Input

Output

Try the problem first. Open one hint at a time.

Hint 1

Work out how many units fall in each slab, then multiply by that slab rate.

Hint 2

For a slab, the cost of earlier slabs is fixed: 500 for the first 100 units and 800 more for the next 100.

Write your Python code, run it on the examples and submit it to hidden tests.