I think he wanted to know how much they charge to pack, not ship.
I assume OP does not have original boxes, so I would hope that UPS will quote you on double boxing them. Best way with displays, or fragile items.
4 boxes. Bubblewrap the LCDs. Put one each into a box of packing peanuts. Take that box and put in a bigger box filled with packing peanuts. Repeat for 2nd LCD. Should have two big boxes. Likely 15lbs each. Yes?
I didn't know UPS would pack stuff. I DO KNOW they destroy your packages! And for Free! --