Translate a language file to Spanish

We need a simple language file with about 580 short phrases in English translated to international Spanish (more specifically, Mexico or Central America Spanish). The language file is a simple language file in PHP from the WordPress e-Commerce module. No programming knowledge is required as if you don't know programming I can assist you with instructions on how to modify the file (it's a simple text file), but if you already know some basics of programming in PHP, Perl, Javascript or any other programming language it's a plus. Attached is the file we need translated for your reference. Guaranteed excellent rating and prompt payment for a decent translation to Spanish of the language file. Feel free to ask if you have any questions!