A handy way to convert your dollar values to an unreadable base 16 variant.

checkwriting.js

function zero(n){
    n = n.length == 1 ? n + "0" : n;
    return +n;
}

function dollarsToHex(total){

    var parts = total.toString(10).split(".");
    return parts.map(function(part){
        return zero(part).toString(16);
    }).join(".");

}

function hexToDollars(hex){
    var parts = hex.split(".");
    return parts.map(function(part){
        return parseInt(part, 16);
    }).join(".");
}

(for writing checks. eg: "two hundred and fifty five and 50/100" but in the box you put "$ff.32" ...)