Why does e fowl charge alot for 2 ducks?

i was planning on getting a Pekin duckling ($5.95) and a chocolate Indian Runner duckling ($7.23). I had a coupon code of $7.41 and the price i should be paying is $5.77. for some reason it costs 140.76! why is that? they added something to it like if you wanted to add more ducks but i'm not really sure