$$(75-60)\times 10 = 150$$. 
A shop purchased some basketballs at ＄$$60$$ each. It then sold them at ＄$$75$$ each. How much did the shopkeeper earn for $$10$$ basketballs? 
* ＄$$150$$ 
* ＄$$200$$ 
* ＄$$250$$ 
* ＄$$300$$ 