gistfile1.txt

  .product-listing {
    @extend %group;
    .product {
      @include respond-to(36.25em) {
        //580px
        @include span-columns(8); 
        @include nth-omega(2n);
      }

      @include respond-to(47.5em) {
        //760
        @include reset-columns();
        @include remove-nth-omega(2n);
        @include span-columns(5.02);
        @include nth-omega(3n);
      }

      &:nth-child(2n + 1 ) {
        @include respond-to(36.25em) {
          //580px
          clear: both;
        }
        @include respond-to(47.5em) {
          //760px
          clear: none;
        }
      }
      &:nth-child(3n + 1 ) {
        @include respond-to(47.5em) {
          //760px
          clear: both;
        }
      }
      
    } //product