The cost of my algebra book is $$200\textbackslash\%$$ of that of my geometry book.  The cost of my geometry book is $$\frac{4}{3}$$ that of my calculus book. If my calculus book costs ＄$$21$$, how much do all $$3$$ books cost together? 
选项为:A:＄$$28$$  B:＄$$56$$  C:＄$$84$$  D:＄$$105$$  请回答其中一个选项.