Very rarely the entertainment.com site will have free shipping thru their link. But you have to be a member to access it. If you've bought an entertainment book, you can sign on.
I checked for you today, there's nothing but $5 off $50 or $7 off $70
Have you tried just ordering the same items from another store that does offer free shipping? You may pay a little more, but it has to be cheaper than $45 shipping, or so I would hope. Paying for shipping is such an annoyance these days!
Bullseye item will Ship Free (if over $50) but other items will still show shipping charges. Usually they will "break it up" into line items. Only way is choosing bullseye items, or maybe talk to CSR and maybe catch a break with them. Good luck.