Getting the form to be uniform

Why can't I edit the fonts inside a spreadsheet form? How do I add $ signs to the value? How do I make the cells of a spreadsheet wider?

The font for the spreadsheet widget can be adjust by adding the following CSS to the widget CSS:

.cell-input {

    font-size: 10px!important;

}

It looks like you were already able to adjust the sizing of the columns.