Ten pairs of sunglasses for $9.99 for both men and women as listed.  Shipping is $5.99 so the total $15.98 shipped.  Note that additional 10-pack only adds $1 to the shipping cost and that the description says they will be shipped between 2/1 to 2/15.  Here is a screenshot for your reference.

• Men's Sunglasses (10-Pack) for $9.99          • Women's Sunglasses (10-Pack) for $9.99