Hi

I've made a little function to convert number to word. It seems goes well. However, I need a little advice about rules to convert it, since English isn't my primary language, and I forgot some of the rules.

1. $ 101.
Should be said One Hundred and One dollars (which I use) or just One Hundred one dollars?
If it must use "and", then I should use "and" until 9 ($109: One hundred and nine dollars ?). And how about $110 (One hundred ten dollars or One hundred and ten dollars?).

2. $ 101,101
Should be said One hundred and one thousand one hundred and one dollars (which is my function do right now), or just One hundred one thousand one hundred one dollars ?

If anyone can point where I might find the article about these rules, I'd appreciate it.

Thanks.