Mel's Monopoly money
Here's a brief description of the contestant's attempt. Someone's probably working writing up more detail!
Mel brought in a suitcase containing £987,000 of Monopoly money and £240 in real money. She would have had to have bought 48 games of Monopoly to get that much, thus spending £815.12 on Monopoly sets.
(Written by Taskmaster Wiki contributors)