How can a dollar sign be shown next to the number box?

Also, how can i show the dollar sign next to my number box.

I presume that you would like to show "$" right before the price of the total.

Now this can be done through CSS, and this is the code for it (only for that specific numeric field on the form, so for others it needs to be slightly modified):

#cid_12:before {
    content: "$";
}

This will make it look like this:

Or you can use this:

#cid_12:before {
    content: "$";
}
#input_12 {
    border: medium none;
    box-shadow: none;
    margin-left: 0;
    padding-left: 0;
}

to make it look like so:

Both of these should be added to your form by following these steps: Inject Custom CSS Codes

Do let us know how it goes for you.