Petra wants to buy a skateboard. The skateboard deck usually cost $37.50, but it is on sale for 20% off. PART A: If the sales tax rate is 5.2%, how much will petra pay for the skateboard deck in all?
PART B: If the selling prive of $37.50 repersents a 20% markup, will the store still make a profit afte the 20% markdown? Explain.