End-of-Day Order Report

At closing time, a shop goes through all of today's orders at once. Each order is a tuple (item, quantity), where the quantity is text.

Write day_report(prices, orders) that returns a dictionary with three keys:

• "total": the sum of prices[item] * int(quantity) for every order that works
• "unknown": how many orders asked for an item not in prices
• "bad_quantity": how many orders had a quantity int() can't read

If an order has both problems, count it as "unknown" only.