Equipment with a cost of $$305000$ has an estimated salvage value of $$21000$ and an estimated life of $4$ years or $10000$ hours. It is to be depreciated by the straight$-$line method. What is the amount of depreciation for the first full year, during which the equipment was used for $2000$ hours?

$$56800.$

$$73750.$

$$71000.$

$$76250.$