1.As many as fifty candidates had applied for the post.

2.They will make a charge of up to as much as one million yen.

3.There's a cover charge of more than $3.

4.I didn't have more than a dollar on me.

5.I paid less than ten pounds for it.

已上例句中的划线部分是，语法书讲解副词修饰基数词时的例句，我不太理解，请老师帮忙讲解？

疑惑：1. 单位词算在基数词里吗？（如dollar,million等）

           2. more than和as much as算一个副词吗？