I am a native Spanish and English speaker who is willing to help you translating between English and Spanish. I translate anything, yes, anything. Every word is worth $0.01. Don't hesitate to ask me anything you're wondering and don't hesitate to give me comments or advice.
Have a wonderful day/night!,
Alana C. :-)
----NOTE----
For the extras, take count that you are already buying 500 words so with adding the extras, your result will be 1000, 2000, 3000, etc.