How much does this cost to the nearest dollar?

Nikon MB-D80 Multi-Power Battery Pack for the Nikon D80 & D90 Digital SLR Camera - Retail Packaging
The Nikon MB-D80 Multi-Power Battery Pack holds 2 Lithium-Ion rechargeable batteries, effectively doubling your total shooting time. Can also hold a AA battery holder (included), so users can use AA batteries as a power backup. The MB-D80 Multi-Power Battery Pack provides an AF-on button, vertical firing release with lock, and front and rear command dials. Runs on either one or two batteries or six AA-size batteries Works with AA-size alkaline, Nickel Metal Hydride (Ni-MH), lithium, and nickel-manganese batteries Provides added stability with extended shooting potential Dimensions 3 x 2.25 x 1.5

Price is $89.00

Price: $89