There is no packages page or rates.
If you want to sell advert space you make up your own stuff for that.
Some people use something like WooCommerce for that.
AdRotate Geo is only available in AdRotate Pro, which you don’t seem to have.
But no, in AdRotate Geo you can not define zipcodes. You can use cities of-course. In some countries provinces or even counties work, too.