John gets a new EpiPen every 6 months.  They cost $500 and insurance covers 75%.  How much does he pay per year?
He needs to buy 12/6=<T>divide(12, 6)=2.0 per year
Insurance covers 500*.75=$<T>multiply(500, 0.75)=375.0
So he pays 500-375=$<T>subtract(500, 375)=125
So he pays 125*2=$<T>multiply(125, 2)=250
