There's no single minimum, it depends on the redemption method. The lowest start at $5.00 (R$500) Visa Virtual, Mastercard, Amazon, Xbox, and Apple, while crypto and some gift cards start at $10.00 (R$1,000).
Each method also has a maximum per payout, between $50.00 and $75.00. You can see each method's range on its card on the Cashout page, and in the Redemption methods article.
Amounts appear in your display currency. Your balance and Verified Account status are shown at the top of the Cashout page.