Roaman's offers the Denim 24/7 Women's Tiered Lace Dress in Oatmeal or Chambray Blue for $26.99. Coupon code "RD72192" bags free shipping. That's a savings of at least $45 and the lowest total price we could find. It's available in sizes 14W to 32W, although not in all sizes/colors.
Walmart offers the Derek Heart Juniors' Belted Denim Dress in Sky Blue or Indigo for $10. Opt for in-store pickup to dodge to the $5.97 shipping charge. That's $5 off list and the lowest price we could find. It's available in sizes S to L, although not in all size/color combinations.