Too many errors

The font size in the prices is too large for 3 digits, the admin panel is hard to use because the fields all pop-up as you enter in data. The pop-up fields are way above the form too so when you click on them it makes it hard to find initially. Also the css was not able to be edited because the stylesheets were written in way that would need me to alter the plugin files as apposed to just adding my own css to my themes stylesheet.