Answer: Cost of item with free shipping is cheaper than 15% coupon off.
Explanation:
Since we have given that
Cost of item = $56
Amount for shipping = $9.25
Rate of coupon for off = 15%
Amount from coupon is given by

So, 8.4<9.25
amount they have to pay if there is free shipping is given by

Amount they have to pay if there is 15% off is given by

Hence, Cost of item with free shipping is cheaper than 15% coupon off.