Generated by SassMeister.com.

SassMeister-input-HTML.html

<section>
  <div class="homepage-content">content</div>
  <div class="homepage-sidebar">sidebar</div>
</section>

SassMeister-input.scss

// ----
// Sass (v3.4.13)
// Compass (v1.0.3)
// Bourbon (v4.2.2)
// Neat (v1.6.0)
// ----

@import "bourbon/bourbon";
@import "neat/neat";

section {
      @include outer-container;
}

.homepage-content {
      @include span-columns(8); float:right;
   }

.homepage-sidebar {
      @include span-columns(4);
}

SassMeister-output.css

* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

section {
  *zoom: 1;
  max-width: 68em;
  margin-left: auto;
  margin-right: auto;
}
section:before, section:after {
  content: " ";
  display: table;
}
section:after {
  clear: both;
}

.homepage-content {
  float: left;
  display: block;
  margin-right: 2.35765%;
  width: 65.88078%;
  float: right;
}
.homepage-content:last-child {
  margin-right: 0;
}

.homepage-sidebar {
  float: left;
  display: block;
  margin-right: 2.35765%;
  width: 31.76157%;
}
.homepage-sidebar:last-child {
  margin-right: 0;
}

SassMeister-rendered.html

<section>
  <div class="homepage-content">content</div>
  <div class="homepage-sidebar">sidebar</div>
</section>