<span><em>~de qué estás hablando</em>
how to say it:
de: <em>day</em>
qué: <em>K</em>
</span>estás: <span><em>es-stas </em>
</span>hablando: <em>hey-bland-o</em>
<em>~Hope this helped! :)</em>
The answer is escucha.
The subject here is Marta, and we have to conjugate the verb to match the subject, which is a 'she' and you just add 'a' to the stem.
A 423,900.00 because cuatrocientos 400 veintitrés 23 mil so you add them which is 423 novecientos 900 and all convined is 423900.00