Which is wrong?

Which is wrong?

Vendor
Educo
Regular price
R 1,047.99
Sale price
R 1,047.99
Regular price
R 1,047.99
Sold out
Unit price
per 
Tax included. Shipping calculated at checkout.

Name and describe items that belong together and select 1 item that does not. There are 4 items on the assignment card, place the red X on the wrong item. Turn the card for self-check. 

Contents:
24 plastic assignment cards (24 x 6 cm)
24 transparent plastic cards with red x (6 x 6 cm)
wooden box (34 x 20 x 6 cm)