The code gives you an extra 50% off the sale price.
Brad's Deals Editor Jim,
These women's Gap High Destructed Cheeky Straight Jeans list at $79.95 and were already on sale for $44.99, but you can get them for $22.49 when you apply the code BIGSALE in your cart at Gap.com. Shipping is free when you spend more than $50. Otherwise, it adds $10. Similar styles sell for more than $39, and these are only available at Gap. Sales tax is charged in most states.