You cannot add "Cisco Catalyst 9300 - Network Advantage - switch - L3 - Managed - 24 x 10/100/1000 (PoE+) - rack-mountable - PoE+ (445 W)" to the basket because the product is out of stock.
Cisco Business 250 Series CBS250-48PP-4G – Switch – L3 – smart – 48 x 10/100/1000 (PoE+) + 4 x Gigabit SFP – rack-mountable – PoE+ (195 W)