Shipping cost help

We need some help in setting our shipping costs / strategies. Is there anyone out there who might be available to help us better implement shipping on our site? We need help in dealing with different shipping costs for wine and non-wine purchases and then what happens when a customer purchases both wine and non-wine in a single transaction (then the shipping costs just get stupid). Thanks!

I’ve tried to figure this out several times and have just ended up not putting our merch on our website currently. Our shipping rates are currently based on # of bottles, but I am wondering if having shipping by weight would work for orders with wine & merch.