Check out this page on Mousesavers:
https://www.mousesavers.com/regular-walt-disney-world-ticket-prices/. You can scroll down to see the prices for 3 day hopper, including tax, so you can compare( chart above will have 2 day base ticket as well if you need that price). Also note the bold print above the chart - they are gate prices, but when you purchase 3 day or more in advance they are $21.30 less, so you can subtract that.