To convert 8.50 pounds UK to US money, you can multiply the amount by the conversion rate:
8.50 GBP x 1.38 USD/GBP = $11.73 USD (approximate)
Therefore, as of September 2021, 8.50 pounds UK was approximately equal to 11.73 US dollars. However, currency conversion rates can fluctuate over time, so it's best to check a reliable currency converter or financial source for the most up-to-date rate.