Respuesta :
7.50 X 315 =2362.50 at the lower price
7.75 X 315 = 2441.25 at the higher price
subtract 2362.50 from 2441.25 you get 78.75
7.75 X 315 = 2441.25 at the higher price
subtract 2362.50 from 2441.25 you get 78.75