Respuesta :

New price=$10.56-(0.2)($10.56)=$10.56-$2.112=$8.448

Answer: the book would cost $8.448
SJ2006

Discount amount would be = 10.56 * 20/100 = 2.11

So, after coupon, book cost would be = 10.56-2.11 = 8.45