in one of my css code I saw this code:
 .\37 u, .\37 u\24 {
            width: 58.3333333333%;
            clear: none;
            margin-left: 0;
        }
I try convert it ...
.7u, .7u$ {
            width: 58.3333333333%;
            clear: none;
            margin-left: 0;
        }
Now I try validate it...so I add 'i' before number....but what is '$' sign? if it is important how can I validate as a normal code?
.i7u, .i7u$ {
            width: 58.3333333333%;
            clear: none;
            margin-left: 0;
        }
I think It is just a symble but I afraid I am wrong
 
     
    