Based on the text, the most expensive item is the desk.
The desk costs $520
The rug costs $240
The dresser costs $450
The nightstand costs $300
In Spanish, the verb forms often make subject pronouns unnecessary, and when that's the case the pronouns shouldn't be used unless there's a reason to.
Nosotros <u>abrimos</u> la tienda todos los días.
Answer:
3. Ana es más seria que su hermana.
4. Bea esta nerviosísima (porque mañana tiene un juego)
Explanation: If you don't want, you don't have to write the parenthesys.