.contenido_tienda{
	position:relative;
	float:left;
	width:710px;
	padding-left:10px;
	top:8px;
	/*background-color:lime; */
}

.producto{
	position:relative;
	float:left;
	width:620px;
	height:275px;
	padding-left:10px;
	margin-top:18px;
	text-align:center; 
	border-bottom:1px dotted #777;
	border-left:1px dotted #777;
	/*background-color:lime; */
}