Create your logo image in png format. Save this image as “logo.png” and upload to images directory of Simple Business Template (path: yourSiteName.com/templates/simple-business/images/). Next you need edit code in template.css file (located: yourSiteName.com/templates/simple-business/css/template.css). Go to 455 line and edit fallowing code:

/* Logo Image ---*/
h1.logo {
width: 130px; /*Width of logo image*/
height: 53px; /*Height of logo image*/
}

h1.logo a {
background: url(../images/logo.png) no-repeat left;
display: block;
width: 130px; /*Width of logo image*/
height: 53px; /*Height of logo image*/
}