Jillian needs to buy a new laptop and finds these coupons for her favorite store. office

Jillian needs to buy a new laptop and finds these coupons for her favorite store.

office world sale! all laptops – buy now and receive a $100 rebate after purchasel *you cannot use this offer with any other coupons office world sale! receive 20% off any one item! the list price for the laptop she wants is $479.99. is it a better deal to use the coupon for the $100 rebate or the 20% off one item? explain your reasoning.