.sf_extra4 {
    float: right;
    display: inline;
    width: 309px;
    height: 252px;
    background-image: url(images/750_qbc_fit.jpg);
 }

 .sf_extra5 {
    float: right;
    display: inline;
    width: 476px;
    height: 252px;
    background-image: url(images/9141_qbc_fit.jpg);
 }