Center ul within div

gistfile1.txt

#foo {
    text-align: center;

    ul {
        display: inline-block;
        list-style: none;
        margin: 0 auto
        width: 100%;
    }

    li {
        background: url('/images/foo.png');
        border: 1px solid #ddd;
        float: left;
        position: relative;
        text-align: left;
        width: 200px;
    }
}