A new barcode reading device has an installed cost basis of $$21,760$ and an estimated service life of ten years. It will have a zero salvage value at that time. The $200\%$ declining balance method is used to depreciate this asset.

a$.$ What will the depreciation charge be in year ten?

b$.$ What is the book value at the end of year nine?

c$.$ What is the gain $($or loss$)$ on the disposal of the device if it is sold for $$4,200$ after nine years?

a$.$ The depreciation charge in year ten will be $ $.($Round to the nearest dollar.$)$

b$.$ The book value at the end of year nine is $ $($Round to the nearest dollar.$)$

c$.$ The gain on the disposal of the device if it is sold for $$4,200$ after nine years is $$.($Round to the nearest dollar.$)$N