I got my shipping calculator from:
But the zipcode and calculate shipping button is wide screen! yikes how can i fix it so that its the same size as the other buttons??
Also- how is it determining the price of the shipping?
I'm not seeing how you mean "wide screen" for me it shows very narrow, much more narrow than the cart. It seems normal, have you resolved it since this post?
As for the shipping rates, these are coming straight from you Shopify account under Settings>Shipping. It looks as if only the default rates are showing so make sure to update these before opening up shop.