Backcountry takes 50% off outlet items via coupon code "50BUMP". (Note that the 50% is taken off the full price, not the outlet price.) Shipping starts at $5.95, or spend over $50 to qualify for free shipping. Some exclusions apply. A couple of best bets, with prices after coupon:
Ralph Lauren offers its Ralph Lauren Black Label Women's Lace-Up Cotton Tank Dress in White for $59 plus $5 for shipping. (Select "Economy" at checkout.) That's $24 under our mention in a different color from July, $236 below list price, and the lowest total price we could find. It's available in sizes M to XL.