How much does this cost to the nearest dollar?

NEEWER Mini Ball Head with Removable Cold Shoe Mount and 1/4” Screw, Detachable Cold Shoe Base, 2 Way Installation Compatible with SmallRig Cage, DSLR Camera, Monitor, LED Video Light (2 Packs, ST44)
Reversible Mounting Plate Designed for infinite combination and endless use possibilities, one side of the top mounting plate is a cold shoe mount for installing PT-3 Triple Cold Shoe, CM14 Pro Microphone, etc. The other side is a 1/4 screw with a nonscratch rubber pad, compatible with SmallRig cage NEEWER F200 Monitor SL90 LED Light CL-06 Cellphone Clamp CL-06 and more Solid & Sleek Construction Made of aluminum alloy and rubber for a stylish look, the ball head is

Price is $21.00

Price: $21.49