A shop purchased some basketballs at ＄$$60$$ each. It then sold them at ＄$$75$$ each. How much did the shopkeeper earn for $$10$$ basketballs? 
选项为:A:＄$$150$$  B:＄$$200$$  C:＄$$250$$  D:＄$$300$$  请回答其中一个选项.