Should three-fifty be hyphenated?
In a fiction book, here's a sentence that needs punctuation help: "I'll give you three-fifty for it." (We're talking about $350, but we don't want to use numbers.) We want to spell them out. Should "three-fifty" be hyphenated or not?
Consider the pronunciation of "three fifty". Is there more stress on the "three" than on the "fifty"? If so, you're dealing with a word compound, and there can be a hyphen. If not, "three fifty" is a phrase not a word, so stress should come at the end.
"Fifty" has more stress than "three", so no hyphen.