Mikasa takes an extra 20% off sitewide via coupon "MOBILE". Shipping adds $8.95, or get free shipping on orders of $99 or more. Some exclusions apply, including clearance items. A few best bets, with prices after coupon and free shipping:
Walmart offers the Rachael Ray Dinnerware Rise Collection 16-Piece Set in White, model no. 58633, for $39.92 with free shipping. (Amazon offers it for the same price.) That's $30 under the lowest total price we could find for the set in any color elsewhere. It has four sets, each including a dinner plate, salad plate, bowl, and mug.
The Prune Danish via Amazon offers Prime members the four Style Setter Spectrum Dessert Cups in Green for $6.99 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping costs $7.72.) That's $9 below the best price we could find for a similar set elsewhere. These glasses are hand-wash only.
ThePruneDanish via Amazon offers Prime members the four Crystal Clear Alexandria Square Dessert Plates for $9.99 with free shipping. (Non-members can qualify for free shipping with orders of $35 or more; otherwise, shipping adds $9.86.) That's the lowest total price we could find for this quantity by $70. Each plate is 7.5" square.