$On$ December $28,2024,$ Tristar Communications sold $10$ units $of$ its new satellite uplink system $to$ various customers for $$25,000$ each. The terms $of$ each sale were$\frac{110}{110},n\frac{30}{n}30.$ Tristar uses the gross 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?