Example on 3 columns

<row>
	<col size="4">
           <price-box>
           	<price-box-header>
           		<h3>Very <strong>Basic</strong></h3>
           	</price-box-header>
           	<price-box-terms>
           		<h6>$15.00 / Month</h6>
           	</price-box-terms>
           	<price-box-body>
           		<price-box-item checked="true">applications</price-box-item>
           		<price-box-item checked="true">upport available</price-box-item>
           		<price-box-item>No hidden fees</price-box-item>
           		<price-box-item>Free</price-box-item>
           		<price-box-item>Stop anytime easily</price-box-item>
           	</price-box-body>
           	<price-box-footer>
           		<button label="Register now" icon="bolt">
           			<event type="click">
           				alert("Register!");
           			</event>
           		</button>
           	</price-box-footer>
           </price-box>
	</col>
	<col size="4">
           <price-box attractiveness="special">
           	<price-box-header>
           		<h3>Good <strong>Choice</strong></h3>
           	</price-box-header>
           	<price-box-terms>
           		<h6>$25.00 / Month</h6>
           	</price-box-terms>
           	<price-box-body>
           		<price-box-item checked="true">applications</price-box-item>
           		<price-box-item checked="true">upport available</price-box-item>
           		<price-box-item checked="true">No hidden fees</price-box-item>
           		<price-box-item>Free</price-box-item>
           		<price-box-item>Stop anytime easily</price-box-item>
           	</price-box-body>
           	<price-box-footer>
           		<button label="Register now" icon="bolt">
           			<event type="click">
           				alert("Register!");
           			</event>
           		</button>
           	</price-box-footer>
           </price-box>
	</col>
	<col size="4">
           <price-box>
           	<price-box-header>
           		<h3>Just <strong>Happy</strong></h3>
           	</price-box-header>
           	<price-box-terms>
           		<h6>$35.00 / Month</h6>
           	</price-box-terms>
           	<price-box-body>
           		<price-box-item checked="true">applications</price-box-item>
           		<price-box-item checked="true">upport available</price-box-item>
           		<price-box-item checked="true">No hidden fees</price-box-item>
           		<price-box-item checked="true">Free</price-box-item>
           		<price-box-item checked="true">Stop anytime easily</price-box-item>
           	</price-box-body>
           	<price-box-footer>
           		<button label="Register now" icon="bolt">
           			<event type="click">
           				alert("Register!");
           			</event>
           		</button>
           	</price-box-footer>
           </price-box>
	</col>
</row>

Example on 4 columns