Laura want to purchase 4 shirts and 3 hat the cost of each shirt at Wm is$15.20.the cost of the hat at Wm is $5.200 the cost of the same shirt at Sm is 5 percent more than the cost at Wm the cost of the same hat at Sm is 2 percent more than the cost at Wm what is the amount Laura save by buying at Wm? show work to haw you solved it please