Help w/ income tax

On December 28,2024 , Tristar Communications sold 12 units of its new satelite uplink system to various customers for $30,000 each. The terms of each sale were 2/10.11/30. Tristar uses the net method to account for sales discounts. In what year will income before tax be affected by discounts, assuming that all customers paid the net-of-discount amount on January 6,2025 ? By how much