Translation:一共五百块。
"一共五百块钱" is also correct, but it's marked as wrong here.
Would 一起五百块 be fine as well, or not, and why? :)
一共 = sum up, 一起 = together with person
一起 = together with a person
五百块一共 should be accepted as well.
No, because adverbs always go before any numerals
