How much does this cost to the nearest dollar?

LDB_BUILDING 5FT Sliding Bypass Barn Door Hardware Kit - for Double Door - One Piece - Single Track - Easy to Install (I Shape Hanger)
Package Included 1x 5FT Rail, 4x Rollers, 4x Rail Spacers, 2x Door Stoppers, 1x Floor Guide, 1x Hex Key, BARN DOOR NOT INCLUDED Overlap Notice There would be a 7 -11 Overlap Space as the two barn doors are hanging in One Rail, the rollers will kick together when you want fully unfold the doors. So please let your door wider( each 4 inches) than your entrance or it will cause the doors do not completely cover the entrance. High Quality Roller Rollers surface covered with High Quality Nylon

Price is $80.00

Price: $79.99