No, "a" R520. You're mixing up a written vowel with a word which phonetically sounds like it starts with a vowel, but doesn't. It's "an" if the word starts with a vowel - "R" isn't one, even though it's pronounced "arrh".
Sorry to be a spelling fascist, but you started it first.
No, "a" R520. You're mixing up a written vowel with a word which phonetically sounds like it starts with a vowel, but doesn't. It's "an" if the word starts with a vowel - "R" isn't one, even though it's pronounced "arrh".
Sorry to be a spelling fascist, but you started it first.